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Yamamoto ALC, Corrêa MDP, Torres RR, Martins FB, Godin-Beekmann S. Projected changes in ultraviolet index and UV doses over the twenty-first century: impacts of ozone and aerosols from CMIP6. Photochem Photobiol Sci 2024; 23:1279-1294. [PMID: 38762827 DOI: 10.1007/s43630-024-00594-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Accepted: 05/07/2024] [Indexed: 05/20/2024]
Abstract
This study evaluated the health-related weighted ultraviolet radiation (UVR) due to the total ozone content (TOC) and the aerosol optical depth (AOD) changes. Clear-sky Ultraviolet Index (UVI), daily doses, and exposure times for erythema induction (Dery and Tery) and vitamin D synthesis (DvitD and TvitD) were computed by a radiative transfer estimator. TOC and AOD data were provided by six Earth System Models (ESMs) from the Coupled Model Intercomparison Project Phase 6 (CMIP6). For projections, we consider four Shared Socioeconomic Pathways scenarios-SSPs (SSP1-2.6, SSP2-4.5, SSP3-7.0, and SSP5-8.5)-and two time-slices (near: 2041-2060 and far future: 2081-2100). UVR projections showed pronounced changes for the summer hemispheres in the far future. TOC increases in mid- and high latitudes of the Southern Hemisphere caused decreases in UVR at the summer solstice. However, projections did not indicate sun-safe exposure conditions in South America, Australia, and Southern Africa. On the contrary, exposure around solar noon from 10 to 20 min will still be sufficient to induce erythema in skin type III individuals throughout this century. In southern Argentina and Chile, the UVR insufficiency for vitamin D synthesis at solar noon in skin type III remains the same during this century at the winter solstice. In the Northern Hemisphere, UVI and Dery at the summer solstice should remain high (UVI ≥ 8; Dery ~ 7.0 kJ m-2) in highly populated locations. Above 45 °N, UVR levels cannot be enough to synthesize vitamin D in skin type III during the boreal winter. Our results show that climate change will affect human health through excess or lack of solar UVR availability.
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Affiliation(s)
| | - Marcelo de Paula Corrêa
- Natural Resources Institute, Federal University of Itajubá, Av. BPS, 1303, Itajubá, MG, 37500-903, Brazil
| | - Roger Rodrigues Torres
- Natural Resources Institute, Federal University of Itajubá, Av. BPS, 1303, Itajubá, MG, 37500-903, Brazil
| | - Fabrina Bolzan Martins
- Natural Resources Institute, Federal University of Itajubá, Av. BPS, 1303, Itajubá, MG, 37500-903, Brazil
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Sánchez-Pérez JF, Comendador-Jiménez B, Castro E, Cánovas M, Conesa M. Characterization of the effects of vitamin D synthesis and sunburn in the population due to solar radiation exposure using PROBIT methodology. Heliyon 2024; 10:e30864. [PMID: 38784536 PMCID: PMC11112326 DOI: 10.1016/j.heliyon.2024.e30864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 05/06/2024] [Accepted: 05/07/2024] [Indexed: 05/25/2024] Open
Abstract
The main objective of this work is to present a set of equations that relates exposure time to solar radiation, the ultraviolet index (UVI), and its effects, both positive (vitamin D synthesis) and negative (sunburns), including the influence of repeated doses and the incorporation of protective factors. To do so, expressions are proposed for both effects and a time range is specified where repeated doses can be applied. Moreover, we propose expressions (PROBIT equations) that relate the percentage of a population that would reach the recommended daily amount of vitamin D and the repeated dosage to which the population is exposed for skin types I to IV. For all the cases studied, protective factors, such as the use of clothes or sunscreens, were taken into account. Additionally, comparisons were made based on skin types between the generation of daily vitamin D and the onset of sunburn, being able to establish a percentage of those who would suffer from first-degree sunburns when this population reached the recommended daily amount of vitamin D. Thus, it can be noted that when a large percentage of a population wants to obtain the recommended daily allowance of vitamin D of 2000 IU or more, and by exposing a small portion of skin to solar radiation, a considerable percentage of that population would suffer from first-degree sunburn as vitamin D generation is related to the area of exposed skin. Therefore, by increasing the area of skin that is exposed to solar radiation, vitamin D needs can be safely met even with higher daily amounts.
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Affiliation(s)
| | - Begoña Comendador-Jiménez
- General Directorate of Pharmacy and Health Products. Conselleria de Sanidad Universal y Salud Pública. Comunitat Valenciana. Spain
| | - Enrique Castro
- Department of Applied Physics and Naval Technology, Universidad Politécnica de Cartagena, Spain
| | - Manuel Cánovas
- Department of Metallurgical and Mining Engineering, Universidad Católica del Norte, Chile
| | - Manuel Conesa
- Department of Applied Physics and Naval Technology, Universidad Politécnica de Cartagena, Spain
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Kallioğlu MA, Sharma A, Kallioğlu A, Kumar S, Khargotra R, Singh T. UV index-based model for predicting synthesis of (pre-)vitamin D3 in the mediterranean basin. Sci Rep 2024; 14:3541. [PMID: 38347060 PMCID: PMC10861575 DOI: 10.1038/s41598-024-54188-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2023] [Accepted: 02/09/2024] [Indexed: 02/15/2024] Open
Abstract
The importance of solar radiation for the body's ability to synthesize Vitamin D3 is well documented, yet the precise amount of sun exposure required to avoid Vitamin D insufficiency is less clear. To address this knowledge gap, this study sought to utilize the sun in a suitable period at the optimum dose by utilizing numerical simulations to determine the amount of Vitamin D3 synthesis in the skin according to season, time of day, and geographical location in Turkey. The study was carried out in three stages; in the first stage, daily, monthly, and annual values were determined in cases where the solar zenith angle has the active UV-B wavelength. The second stage determined the level of Vitamin D that can be synthesized in all skin types at 25% solar radiation exposure. In the third stage, the sun exposure time required for 1000 International Units (IU) for all skin types was calculated. According to the analysis, the yearly period of active synthesis of D3 on Earth lasts from the beginning of March to the third week of October. During the day, it is between 10:00 and 16:00. For 1000 IU/day, the average annual estimated times (minutes) are 5.05 for Type I, 6.3 for Type II, 7.6 for Type III, 11.35 for Type IV, 15.15 for Type V, and 25.25 for Type VI. The results of this paper will impact awareness for academic-medical users.
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Affiliation(s)
| | - Ashutosh Sharma
- College of Science and Engineering, James Cook University, Townsville, QLD, 4810, Australia
| | - Ayşan Kallioğlu
- Department of Neurology, Faculty of Medicine, Cigli Research and Training Hospital, Izmir Bakırçay University, 8780, Çiğli - İzmir, Turkey
| | - Sunil Kumar
- Department of Nanotechnology and Advanced Materials Engineering and HMC, Sejong University, Seoul, 05006, South Korea
| | - Rohit Khargotra
- Institute of Materials Engineering, Faculty of Engineering, Pannonia University, Veszprem, 8200, Hungary.
- Sustainability Solutions Research Lab, University of Pannonia, Egyetem u. 10., Veszprém, 8200, Hungary.
| | - Tej Singh
- Savaria Institute of Technology, Faculty of Informatics, ELTE Eötvös Loránd University, Budapest, Budapest, 1117, Hungary
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Wallace C, Gordon M, Sinopoulou V, Limketkai BN. Vitamin D for the treatment of inflammatory bowel disease. Cochrane Database Syst Rev 2023; 10:CD011806. [PMID: 37781953 PMCID: PMC10542962 DOI: 10.1002/14651858.cd011806.pub2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/03/2023]
Abstract
BACKGROUND Vitamin D possesses immunomodulatory properties and has been implicated in the pathogenesis and severity of inflammatory bowel disease (IBD). Animal studies and emerging epidemiological evidence have demonstrated an association between vitamin D deficiency and worse disease activity. However, the role of vitamin D for the treatment of IBD is unclear. OBJECTIVES To evaluate the benefits and harms of vitamin D supplementation as a treatment for IBD. SEARCH METHODS We used standard, extensive Cochrane search methods. The latest search date was Jun 2023. SELECTION CRITERIA We included randomised controlled trials (RCTs) in people of all ages with active or inactive IBD comparing any dose of vitamin D with another dose of vitamin D, another intervention, placebo, or no intervention. We defined doses as: vitamin D (all doses), any-treatment-dose vitamin D (greater than 400 IU/day), high-treatment-dose vitamin D (greater than 1000 IU/day), low-treatment-dose vitamin D (400 IU/day to 1000 IU/day), and supplemental-dose vitamin D (less than 400 IU/day). DATA COLLECTION AND ANALYSIS We used standard Cochrane methods. Our primary outcomes were 1. clinical response for people with active disease, 2. clinical relapse for people in remission, 3. quality of life, and 4. withdrawals due to adverse events. Our secondary outcomes were 5. disease activity at end of study, 6. normalisation of vitamin D levels at end of study, and 7. total serious adverse events. We used GRADE to assess certainty of evidence for each outcome. MAIN RESULTS We included 22 RCTs with 1874 participants. Study duration ranged from four to 52 weeks. Ten studies enroled people with Crohn's disease (CD), five enroled people with ulcerative colitis (UC), and seven enroled people with CD and people with UC. Seventeen studies included adults, three included children, and two included both. Four studies enroled people with active disease, six enroled people in remission, and 12 enroled both. We assessed each study for risk of bias across seven individual domains. Five studies were at low risk of bias across all seven domains. Ten studies were at unclear risk of bias in at least one domain but with no areas of high risk of bias. Seven studies were at high risk of bias for blinding of participants and assessors. Vitamin D (all doses) versus placebo or no treatment Thirteen studies compared vitamin D against placebo or no treatment. We could not draw any conclusions on clinical response for UC as the certainty of the evidence was very low (risk ratio (RR) 4.00, 95% confidence interval (CI) 1.51 to 10.57; 1 study, 60 participants). There were no data on CD. There may be fewer clinical relapses for IBD when using vitamin D compared to placebo or no treatment (RR 0.57, 95% CI 0.34 to 0.96; 3 studies, 310 participants). The certainty of the evidence was low. We could not draw any conclusions on quality of life for IBD (standardised mean difference (SMD) -0.13, 95% CI -3.10 to 2.83 (the SMD value indicates a negligent decrease in quality of life, and the corresponding CIs indicate that the effect can range from a large decrease to a large increase in quality of life); 2 studies, 243 participants) or withdrawals due to adverse events for IBD (RR 1.97, 95% CI 0.18 to 21.27; 12 studies, 1251 participants; note 11 studies reported withdrawals but recorded 0 events in both groups. Thus, the RR and CIs were calculated from 1 study rather than 12). The certainty of the evidence was very low. High-treatment-dose vitamin D versus low-treatment-dose vitamin D Five studies compared high treatment vitamin D doses against low treatment vitamin D doses. There were no data on clinical response. There may be no difference in clinical relapse for CD (RR 0.48, 95% CI 0.23 to 1.01; 1 study, 34 participants). The certainty of the evidence was low. We could not draw any conclusions on withdrawals due to adverse events for IBD as the certainty of the evidence was very low (RR 0.89, 95% CI 0.06 to 13.08; 3 studies, 104 participants; note 2 studies reported withdrawals but recorded 0 events in both groups. Thus, the RR and CIs were calculated from 1 study rather than 3). The data on quality of life and disease activity could not be meta-analysed, were of very low certainty, and no conclusions could be drawn. Any-treatment-dose vitamin D versus supplemental-dose vitamin D Four studies compared treatment doses of vitamin D against supplemental doses. There were no data on clinical response and relapse. There were no data on quality of life that could be meta-analysed. We could not draw any conclusions on withdrawals due to adverse events for IBD as the certainty of the evidence was very low (RR 3.09, 95% CI 0.13 to 73.17; 4 studies, 233 participants; note 3 studies reported withdrawals but recorded 0 events in both groups. Thus, the RR and CIs were calculated from 1 study rather than 4). AUTHORS' CONCLUSIONS There may be fewer clinical relapses when comparing vitamin D with placebo, but we cannot draw any conclusions on differences in clinical response, quality of life, or withdrawals, due to very low-certainty evidence. When comparing high and low doses of vitamin D, there were no data for clinical response, but there may be no difference in relapse for CD. We cannot draw conclusions on the other outcomes due to very low certainty evidence. Finally, comparing vitamin D (all doses) to supplemental-dose vitamin D, there were no data on clinical relapse or response, and we could not draw conclusions on other outcomes due to very low certainty evidence or missing data. It is difficult to make any clear recommendations for future research on the basis of the findings of this review. Future studies must be clear on the baseline populations, the purpose of vitamin D treatment, and, therefore, study an appropriate dosing strategy. Stakeholders in the field may wish to reach consensus on such issues prior to new studies.
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Affiliation(s)
| | - Morris Gordon
- School of Medicine, University of Central Lancashire, Preston, UK
| | | | - Berkeley N Limketkai
- Division of Digestive Diseases, University of California Los Angeles, Los Angeles, California, USA
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Khoo CS, Shukor MF, Tan JK, Tan MM, Yong LL, Sahibulddin SZ, Mat Desa SH, A Wahab N, Hod R, Tan HJ. Prevalence and predictors of vitamin D deficiency among adults with epilepsy: A cross-sectional study. Epilepsy Behav 2023; 147:109432. [PMID: 37716324 DOI: 10.1016/j.yebeh.2023.109432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 08/20/2023] [Accepted: 08/31/2023] [Indexed: 09/18/2023]
Abstract
BACKGROUND Vitamin D deficiency among adult people with epilepsy (PWE) is scarcely studied, despite its essential role in bone health and maintaining homeostasis. Several studies have studied the relationship between factors related to epilepsy and vitamin D metabolism. We aim to investigate this in our multi-ethnic society. METHODS This was a single-center cross-sectional study. We recruited 159 participants diagnosed with epilepsy on antiseizure medications (ASMs). We included those aged 18 years and above, excluding patients with long-term medical conditions that would affect vitamin D metabolism. Sociodemographic data and details of epilepsy were collated. Venous sampling was performed to analyze the levels of albumin-corrected calcium, phosphate, alkaline phosphatase, and 25-hydroxyvitamin D3 [25(OH)D]. Serum 25(OH)D level is defined as deficient (<20 ng/ml), insufficient (20-29 ng/ml), and sufficient (≥30 ng/ml). RESULTS The study reported that 73 (45.9%) participants had vitamin D deficiency, 38 (23.9%) had vitamin D insufficiency, and 48 (30.2%) patients had sufficient vitamin D levels. The predictors identified were PWE aged 18 to 44 years old (p = 0.001), female gender (OR 3.396, p = 0.002), and ethnicity (p < 0.001), specifically Malay and Chinese. However, no significant association was identified between types of ASMs, serum calcium, or the prevalence of vitamin D deficiency. CONCLUSION Vitamin D deficiency among PWE is prevalent in our local population, suggesting that regular screening should be considered for those at risk. Early identification would allow intervention to reduce the risk of future complications.
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Affiliation(s)
- Ching Soong Khoo
- Faculty of Medicine, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia; Department of Medicine, Hospital Canselor Tuanku Muhriz, Kuala Lumpur, Malaysia.
| | - Mohd Fadzli Shukor
- Faculty of Medicine and Health Science, Universiti Malaysia Sabah, Malaysia
| | - Juen Kiem Tan
- Faculty of Medicine, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia; Department of Medicine, Hospital Canselor Tuanku Muhriz, Kuala Lumpur, Malaysia
| | | | - Li Ling Yong
- Faculty of Medicine, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
| | | | - Siti Hajar Mat Desa
- Department of Medicine, Hospital Canselor Tuanku Muhriz, Kuala Lumpur, Malaysia
| | - Norasyikin A Wahab
- Faculty of Medicine, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia; Department of Medicine, Hospital Canselor Tuanku Muhriz, Kuala Lumpur, Malaysia
| | - Rozita Hod
- Department of Public Health Medicine, Faculty of Medicine, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
| | - Hui Jan Tan
- Faculty of Medicine, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia; Department of Medicine, Hospital Canselor Tuanku Muhriz, Kuala Lumpur, Malaysia
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Larin IK. Biologically Active UV Radiation in the 21st Century. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY B 2023. [DOI: 10.1134/s1990793123010074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/07/2023]
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A Data Driven Approach to Identify Safe and Adequate Schemes for Vitamin D Fortification. Foods 2022; 11:foods11243981. [PMID: 36553723 PMCID: PMC9816930 DOI: 10.3390/foods11243981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Revised: 11/11/2022] [Accepted: 12/01/2022] [Indexed: 12/13/2022] Open
Abstract
Food fortification is a strategy to increase low vitamin D intake. In order to avoid the intake of a population exceeding the upper tolerable intake level, the right choice of food groups to fortify is of crucial importance. An automated fortification tool was developed based on dietary intake data from the Danish National Survey of Dietary Habits and Physical Activity 2011-2013 (DANSDA), taking into account the energy contribution of the fortified food. The fortification of food group is a variant in the linear modelling, where the optimization ensures the lowest possible variation in deviation of the calculated intake and the target intake. The resulting tool demonstrated that the lowest limit of fortification, where the model works, is 12 µg/10 MJ, when fortification of any food group is allowed. The tool also demonstrated that, by increasing the allowed upper level of fortification from 12 µg/10 MJ up to 30 µg/10 MJ, the food groups selected for fortification and the level of fortification in those food groups may change. Specifically, fewer food groups seem to be needed as the upper level of fortification is increased. The optimized scenarios, using the food groups, including milk, cheese, cereals, fats, and juice, were tested on dietary-survey data and demonstrated that all the projected scenarios manage to lift the median vitamin D intake to the targeted intake safely. A data-driven approach was used to develop a simple, fast, and automated fortification tool to test different vitamin D food fortification strategies.
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Grifoni D, Betti G, Bogi A, Bramanti L, Chiarugi A, Gozzini B, Morabito M, Picciolo F, Sabatini F, Miligi L. Protective Measures From Solar Ultraviolet Radiation for Beach Lifeguards in Tuscany (Italy): Shade and Clothing Strategies. Saf Health Work 2022; 13:421-428. [PMID: 36579014 PMCID: PMC9772484 DOI: 10.1016/j.shaw.2022.08.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Revised: 07/25/2022] [Accepted: 08/29/2022] [Indexed: 12/31/2022] Open
Abstract
Background The exposure to solar ultraviolet radiation is a significant risk factor generally underestimated by outdoor workers and employers. Several studies have pointed out that occupational solar exposure increased eye and skin diseases with a considerable impact on the lives and productivity of affected workers.The main purpose of this study was to evaluate the effectiveness against ultraviolet radiation of some measures recently undertaken for the protection of lifeguards in a coastal area of Tuscany. Methods Different shading structures (gazebos and beach umbrella) were tested during a sunny summer's day on a sandy beach by means of two radiometers; the UV protection offered by some T-shirts used by lifeguards was also tested in the laboratory with a spectrophotometer. Results The analysed shading structures strongly reduced the ultraviolet radiation by up to 90%, however a not always negligible diffuse radiation is also present in the shade, requiring further protective measures (T-shirt, sunglasses, sunscreen, etc.); the tested T-shirts showed a very good-excellent protection according to the Australian/New Zealand standard. Conclusion Results obtained in this study suggest how the adoption and dissemination of good practices, including those tested, could be particularly effective as a primary prevention for lifeguards who are subjected to very high levels of radiation for long periods.
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Affiliation(s)
- Daniele Grifoni
- CNR-IBE - Institute of Bioeconomy - National Research Council, Sesto Fiorentino, Italy,LaMMA Consortium, Sesto Fiorentino, Italy,Corresponding author. Institute of Bioeconomy - National Research Council, Via Madonna del Piano, 10, 50019, Sesto Fiorentino, Italy.
| | - Giulio Betti
- CNR-IBE - Institute of Bioeconomy - National Research Council, Sesto Fiorentino, Italy,LaMMA Consortium, Sesto Fiorentino, Italy
| | - Andrea Bogi
- Physical Agents Sector, Regional Public Health Laboratory, Siena, Italy
| | - Lucia Bramanti
- AUSL North West Tuscany, Hygiene and Health at Work Unit, Prevention Department, Versilia, Italy
| | - Alessandra Chiarugi
- Screening and Secondary Prevention Unit, Institut for Cancer Research, Prevention and Clinical Network (ISPRO), Florence, Italy
| | - Bernardo Gozzini
- CNR-IBE - Institute of Bioeconomy - National Research Council, Sesto Fiorentino, Italy,LaMMA Consortium, Sesto Fiorentino, Italy
| | - Marco Morabito
- CNR-IBE - Institute of Bioeconomy - National Research Council, Sesto Fiorentino, Italy
| | | | - Francesco Sabatini
- CNR-IBE - Institute of Bioeconomy - National Research Council, Sesto Fiorentino, Italy
| | - Lucia Miligi
- Environmental and Occupational Epidemiology Branch - Cancer Risk Factors and Lifestyle Epidemiology Unit, Institute for Cancer Research, Prevention and Clinical Network (ISPRO), Florence, Italy
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Hsu LC, Hsu S, Tan TH, Cheng CH, Chang CC. Developing Low-Cost Mobile Device and Apps for Accurate Skin Spectrum Measurement via Low-Cost Spectrum Sensors and Deep Neural Network Technology. SENSORS (BASEL, SWITZERLAND) 2022; 22:8844. [PMID: 36433441 PMCID: PMC9695952 DOI: 10.3390/s22228844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Revised: 11/07/2022] [Accepted: 11/12/2022] [Indexed: 06/16/2023]
Abstract
In recent years, skin spectral information has been gradually applied in various fields, such as the cosmetics industry and clinical medicine. However, the high price and the huge size of the skin spectrum measurement device make the related applications of the skin spectrum unable to be widely used in practical applications. We used convolutional neural network (CNN) to achieve a satisfying accuracy of the Fitzpatrick skin-type classification by using a simple self-developed device in 2018. Leveraging on the hardware, firmware, and software app-developing experience, a low-cost miniature skin spectrum measurement system (LMSSMS) using deep neural network (DNN) technology was further studied, and the feasibility of the system is verified in this paper. The developed LMSSMS is divided into three parts: (1) miniature skin spectrum measurement device (MSSMD), (2) DNN model, and (3) mobile app. The MSSMD was developed with innovative low-cost MSSC, 3D printing, and a simple LED light source. The DNN model is designed to enhance measurement accuracy. Finally, the mobile app is used to control and show the measurement results. The developed app also includes a variety of skin-spectrum-related applications, such as erythema index and melanin index (EI/MI) measurement, Fitzpatrick skin-type classification, Pantone SkinTone classification, sun-exposure estimation, and body-fat measurement. In order to verify the feasibility of LMSSMS, we used the standard instrumentation device as a reference. The results show that the accuracy of the LMSSMS can reach 94.7%, which also confirms that this development idea has much potential for further development.
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Affiliation(s)
- Ling-Cheng Hsu
- Department of Electrical Engineering, National Taipei University of Technology, Taipei 10608, Taiwan
| | - Shiang Hsu
- Department of Electrical Engineering, National Taipei University of Technology, Taipei 10608, Taiwan
| | - Tan-Hsu Tan
- Department of Electrical Engineering, National Taipei University of Technology, Taipei 10608, Taiwan
| | - Chia-Hsing Cheng
- Department of Electrical Engineering, National Formosa University, Yunlin 632301, Taiwan
| | - Cheng-Chun Chang
- Department of Electrical Engineering, National Taipei University of Technology, Taipei 10608, Taiwan
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Araújo TSS, Santos CS, Soares JKB, Freitas JCR. Vitamin D: a potentially important secosteroid for coping with COVID-19. AN ACAD BRAS CIENC 2022; 94:e20201545. [PMID: 36000671 DOI: 10.1590/0001-3765202220201545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Accepted: 01/28/2021] [Indexed: 12/15/2022] Open
Abstract
COVID-19 is a disease that has caused a high number of deaths in the world, and despite being controlled, it requires attention and the search for new quick and economical therapeutic strategies. In this sense, vitamin D stands out, an immunomodulator that has shown beneficial effects in decreasing the risk and severity of acute respiratory tract infections, including COVID-19. Therefore, this review presents a number of experimental, observational and clinical studies on the importance of vitamin D against viral infections with an emphasis on COVID-19, highlighting the relationship between vitamin D, Renin-Angiotensin System and cytokine storms with decreased inflammatory lesions in patients with COVID-19. In addition, aspects of pathophysiology, metabolism, risk factors, sources and recommendations of vitamin D are described. We conclude that vitamin D plays a protective role against inflammatory lesions and can decrease the risk of infections and the severity of COVID-19. Therefore, it is essential to maintain adequate levels of vitamin D to avoid complications related to its deficiency.
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Affiliation(s)
- Thayanne S S Araújo
- Universidade Federal de Campina Grande, Centro de Educação e Saúde, Rua Professora Maria Anita Furtado Coelho, s/n, Sítio Olho D'água da Bica, 58175-000 Cuité, PB, Brazil
| | - Cosme S Santos
- Universidade Federal Rural de Pernambuco, Departamento de Química, Rua Dom Manoel de Medeiros, s/n, 52171-900 Recife, PE, Brazil
| | - Juliana K B Soares
- Universidade Federal de Campina Grande, Centro de Educação e Saúde, Rua Professora Maria Anita Furtado Coelho, s/n, Sítio Olho D'água da Bica, 58175-000 Cuité, PB, Brazil
| | - Juliano C R Freitas
- Universidade Federal de Campina Grande, Centro de Educação e Saúde, Rua Professora Maria Anita Furtado Coelho, s/n, Sítio Olho D'água da Bica, 58175-000 Cuité, PB, Brazil.,Universidade Federal Rural de Pernambuco, Departamento de Química, Rua Dom Manoel de Medeiros, s/n, 52171-900 Recife, PE, Brazil
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11
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Gregoire AM, VoPham T, Laden F, Yarosh R, O'Brien KM, Sandler DP, White AJ. Residential ultraviolet radiation and breast cancer risk in a large prospective cohort. ENVIRONMENT INTERNATIONAL 2022; 159:107028. [PMID: 34894486 PMCID: PMC8748390 DOI: 10.1016/j.envint.2021.107028] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Revised: 11/23/2021] [Accepted: 12/03/2021] [Indexed: 05/07/2023]
Abstract
BACKGROUND Ambient ultraviolet (UV) radiation has been increasing due to climate change. While this may result in adverse health consequences such as an increased incidence of skin cancer, UV radiation is also a source of vitamin D, which has been hypothesized to be protective for breast cancer risk. METHODS Using a spatiotemporal kriging model, we estimated residential UV exposure levels for the enrollment addresses (2003-2009) of breast cancer-free women aged 35-74 years participating in the Sister Study and living in the contiguous United States (N = 48,450). Cox proportional hazards models were used to estimate adjusted hazard ratios (HRs) and 95% confidence intervals (95% CIs) for the risk associated with UV exposure levels (mW/m2) categorized in quintiles. We examined the association for breast cancer overall (invasive and ductal carcinoma in situ) and by estrogen receptor (ER) status of the tumor. We considered effect modification by regular (≥4 times/week) vitamin D supplement use. RESULTS Over a median of 10.5 years of follow up, 3,510 incident breast cancer diagnoses were reported. We found no evidence of an association between living in areas with higher levels of UV radiation and overall breast cancer risk (HRQ5 vs. Q1 = 1.00, 95% CI: 0.90, 1.11). Higher UV levels were inversely associated with the risk of ER- breast cancer (HRQ5 vs. Q1 = 0.73, 95% CI: 0.55-0.99), but not ER+ (HR Q5 vs. Q1 = 1.04, 95% CI: 0.92-1.18). For ER- breast cancer, the inverse association was only evident in women who did not regularly take vitamin D supplements (HRQ5 vs. Q1 = 0.52, 95% CI: 0.33-0.81) compared with those who did regularly take vitamin D supplements (HRQ5 vs. Q1 = 1.02, 95% CI: 0.68-1.54; p-for-heterogeneity = 0.12). CONCLUSIONS The findings from this study support a role for UV exposure and vitamin D in the etiology of ER- breast cancer.
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Affiliation(s)
- Allyson M Gregoire
- Epidemiology Branch, National Institute of Environmental Health Sciences, Research Triangle Park, NC, USA
| | - Trang VoPham
- Epidemiology Program, Public Health Sciences Division, Fred Hutchinson Cancer Research Center, 1100 Fairview Ave N, Seattle, WA 98109, USA
| | - Francine Laden
- Department of Epidemiology, Harvard T. H. Chan School of Public Health, 677 Huntington Avenue, Boston, MA 02115, USA; Channing Division of Network Medicine, Brigham and Women's Hospital and Harvard Medical School, 181 Longwood Avenue, Boston, MA 02115, USA; Department of Environmental Health, Harvard T. H. Chan School of Public Health, 677 Huntington Avenue, Boston, MA 02115, USA
| | - Rina Yarosh
- Department of Epidemiology, University of North Carolina Gillings School of Global Public Health, Chapel Hill, NC, USA
| | - Katie M O'Brien
- Epidemiology Branch, National Institute of Environmental Health Sciences, Research Triangle Park, NC, USA
| | - Dale P Sandler
- Epidemiology Branch, National Institute of Environmental Health Sciences, Research Triangle Park, NC, USA
| | - Alexandra J White
- Epidemiology Branch, National Institute of Environmental Health Sciences, Research Triangle Park, NC, USA.
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12
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Gazala MP, Gupta V, Mishra S, Vandana K, Ratre M. Serum Vitamin D level and its association with red blood cell indices in patients with periodontitis. J Indian Soc Periodontol 2022; 26:446-450. [PMID: 36339383 PMCID: PMC9626783 DOI: 10.4103/jisp.jisp_443_21] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2021] [Revised: 01/10/2022] [Accepted: 01/15/2022] [Indexed: 11/24/2022] Open
Abstract
Background: Research of late has brought to light a connect between Vitamin D and anemia. The level of 25hydroxyvitamin D (25(OH) D) is decreased in periodontitis subjects as against subjects without periodontitis and this reduced level could be related to more risk for anemia in periodontitis patients. Objective: This study aimed to evaluate the serum 25(OH) D levels and red blood cell indices in patients affected by generalized Stage III Grade B periodontitis and healthy controls and to assess the association between level of Vitamin D and red cell indices in periodontitis patients. Materials and Methods: The subjects were categorized into (i) case and (ii) control group of 30 each. Clinical parameters including oral hygiene index simplified, mean ratio of sites that bled on probing, gingival index, probing pocket depth, and the clinical attachment loss were assessed in both the groups. Subjects' blood samples (venous) were taken for the biochemical analysis. Results: In contradiction to healthy subjects, periodontitis subjects had significantly diminished 25(OH) D levels, hemoglobin (Hb), hematocrit, and mean corpuscular hemoglobin concentration (MCHC). 25(OH) D was moderately correlated with MCHC (r = 0.53) and it was statistically significant (P = 0.002). Conclusion: Periodontitis impacts Vitamin D status which further causes anemia. It suggests that effective management of periodontitis can help maintain sufficient Vitamin D status and may be vital in preventing anemia.
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13
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Brogniez C, Doré JF, Auriol F, Cesarini P, Minvielle F, Deroo C, Catalfamo M, Metzger JM, Da Conceicao P. Erythemal and vitamin D weighted solar UV dose-rates and doses estimated from measurements in mainland France and on Réunion Island. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY. B, BIOLOGY 2021; 225:112330. [PMID: 34678614 DOI: 10.1016/j.jphotobiol.2021.112330] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Revised: 09/06/2021] [Accepted: 10/04/2021] [Indexed: 06/13/2023]
Abstract
Solar UV radiation causes beneficial and detrimental changes in human health. International and national Health agencies recommend avoiding sun exposure when the solar rays are strongest (typically 2 h before and after solar noon). In this study we detail and refine such recommendations. We estimated biologically-effective radiation (inductive of erythema and pre-vitamin D) using spectral solar UV radiation measurements on a horizontal plane at three French sites equipped with spectroradiometers: Villeneuve d'Ascq (VDA) (North of France); Observatoire de Haute-Provence (OHP) (French Southern Alps); and Saint-Denis de La Réunion (SDR) on Réunion Island, in the Indian Ocean. These sites are very different: VDA is a semi-urban site in a flat region, OHP a rural mountainous site and SDR a coastal urban site on a small mountainous island. Biologically active radiation was analyzed by studying erythema induction and measuring pre-vitamin D synthesis. Dose-rates, doses and times for sunburn induction and vitamin D production were derived. Regarding the level of vitamin D dose considered here (1000 IU), we found that at mainland sites time required for vitamin D synthesis was relatively long, even around solar noon, in winter months this could be 2-3 h for phototype II individuals exposing their face and hands. In the tropics vitamin D could always be synthesized in a reasonable time (e.g. 20 min in winter). By contrast, in summer, the required duration times (exposing face, hands, arms and legs) are very short, approximately 2-4 min on the mainland and 1 min in the tropics for phototype II individuals. In all skin phototypes the duration of sun exposure required to induce erythema was generally longer than that to produce vitamin D. These quantitative results, obtained using an instrument measuring on a horizontal plane and with an unobstructed view, do not represent realistic values for human exposure. To account for realistic human body exposure, received doses and times of exposure were adjusted. Our study shows that, mostly in summer, the time periods where limited solar exposure is recommended should be extended, especially at low latitude locations.
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Affiliation(s)
- Colette Brogniez
- Univ. Lille, CNRS, UMR 8518, LOA - Laboratoire d'Optique Atmosphérique, F-59000 Lille, France.
| | - Jean-François Doré
- INSERM U 1296 Radiations, Défense, Santé, Environnement, Centre Léon Bérard, F-69000 Lyon, France.
| | - Frédérique Auriol
- Univ. Lille, CNRS, UMR 8518, LOA - Laboratoire d'Optique Atmosphérique, F-59000 Lille, France.
| | - Pierre Cesarini
- Association Sécurité Solaire, Fondation A. de Rothschild, 25 rue Manin, F-75019 Paris, France.
| | - Fanny Minvielle
- Univ. Lille, CNRS, UMR 8518, LOA - Laboratoire d'Optique Atmosphérique, F-59000 Lille, France.
| | - Christine Deroo
- Univ. Lille, CNRS, UMR 8518, LOA - Laboratoire d'Optique Atmosphérique, F-59000 Lille, France.
| | - Maxime Catalfamo
- Univ. Lille, CNRS, UMR 8518, LOA - Laboratoire d'Optique Atmosphérique, F-59000 Lille, France.
| | - Jean-Marc Metzger
- UMS 3365 - OSU Réunion, Université de La Réunion, F-97744 St-Denis de La Réunion, France.
| | - Pierre Da Conceicao
- UMS 3470 - OSU Pytheas, Observatoire de Haute-Provence, F-04870 St-Michel-l'Observatoire, France.
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14
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Fraile Navarro D, López García-Franco A, Niño de Guzmán E, Rabassa M, Zamanillo Campos R, Pardo-Hernández H, Ricci-Cabello I, Canelo-Aybar C, Meneses-Echavez JF, Yepes-Nuñez JJ, Kuindersma J, Gich Saladich I, Alonso-Coello P. Vitamin D recommendations in clinical guidelines: A systematic review, quality evaluation and analysis of potential predictors. Int J Clin Pract 2021; 75:e14805. [PMID: 34486779 DOI: 10.1111/ijcp.14805] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Revised: 08/16/2021] [Accepted: 09/03/2021] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND Vitamin D has been widely promoted for bone health through supplementation and fortification of the general adult population. However, there is growing evidence that does not support these strategies. Our aim is to review the quality and recommendations on vitamin D nutritional and clinical practice guidelines and to explore predictive factors for their direction and strength. METHODS We searched three databases and two guideline repositories from 2010 onwards. We performed a descriptive analysis, a quality appraisal using AGREE II scores (Appraisal of Guidelines Research and Evaluation) and a bivariate analysis evaluating the association between direction and strength of recommendations, AGREE II domains' scores and pre-specified characteristics. RESULTS We included 34 guidelines, 44.1% recommended, 26.5% suggested and 29.4% did not recommend vitamin D supplementation. Guidelines that scored higher for "editorial independence" and "overall quality score" were less likely to recommend or suggest vitamin D supplementation (median 68.8 vs 35.4; P = .001 and 58.3 vs 37.5; P = .02). Guidance produced by government organisations and those that reported source of funding were associated with higher AGREE II scores. Unclear role of source of funding was associated with recommending or suggesting vitamin D supplementation (P = .034). Editorial independence was an independent predictor for recommending or suggesting vitamin D supplementation (OR 1.09; CI95% 1.02 to 1.16; P = .006). CONCLUSIONS Policymakers, clinicians and patients should be aware that lower quality guidelines and those reporting conflicts of interest are more likely to promote vitamin D supplementation. Guideline organisations should improve the quality of their recommendations' development and the management of conflicts of interest. Users and editors should be aware of these findings when using and appraising guidelines.
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Affiliation(s)
- David Fraile Navarro
- Health Centre Dr Mendiguchia Carriche, Servicio Madrileño de Salud, Leganes, Madrid, Spain
- Primary Care, Servicio Madrileño de Salud, Madrid, Spain
- Australian Institute of Health Innovation, Macquarie University, Sydney, Australia
| | - Alberto López García-Franco
- Health Centre Dr Mendiguchia Carriche, Servicio Madrileño de Salud, Leganes, Madrid, Spain
- Primary Care, Servicio Madrileño de Salud, Madrid, Spain
| | - Ena Niño de Guzmán
- Iberoamerican Cochrane Centre, Biomedical Research Institute Sant Pau (IIB-Sant Pau), Barcelona, Spain
| | - Montserrat Rabassa
- Iberoamerican Cochrane Centre, Biomedical Research Institute Sant Pau (IIB-Sant Pau), Barcelona, Spain
| | - Rocío Zamanillo Campos
- Health Research Institute of the Balearic Islands (IdISBa), Balearic Islands, Spain
- Department of Health, Valencian International University (VIU), Valencia, Spain
- Primary Care Research Unit of Mallorca, Balearic Islands Health Services, Balearic Islands, Spain
| | - Héctor Pardo-Hernández
- Sant Pau Biomedical Research Institute (IIB Sant Pau), Barcelona, Spain
- CIBER Epidemiología y Salud Pública (CIBERESP), Barcelona, Spain
| | - Ignacio Ricci-Cabello
- Health Research Institute of the Balearic Islands (IdISBa), Balearic Islands, Spain
- Primary Care Research Unit of Mallorca, Balearic Islands Health Services, Balearic Islands, Spain
- CIBER Epidemiología y Salud Pública (CIBERESP), Barcelona, Spain
| | - Carlos Canelo-Aybar
- Iberoamerican Cochrane Centre, Biomedical Research Institute Sant Pau (IIB-Sant Pau), Barcelona, Spain
| | - Jose F Meneses-Echavez
- Norwegian Institute of Public Health, Oslo, Norway
- Facultad de Cultura Física, Deporte y Recreación, Universidad Santo Tomás, Bogotá, Colombia
| | - Juan José Yepes-Nuñez
- School of Medicine, Universidad de los Andes, Bogotá, Colombia
- Pulmonology Service, Internal Medicine Section, Fundación Santa Fe de Bogotá University Hospital, Bogotá, Colombia
| | - Jesse Kuindersma
- Biomedical Sciences, University of Groningen, Groningen, Netherlands
| | - Ignasi Gich Saladich
- Iberoamerican Cochrane Centre, Biomedical Research Institute Sant Pau (IIB-Sant Pau), Barcelona, Spain
- CIBER Epidemiología y Salud Pública (CIBERESP), Barcelona, Spain
- Universitat Autònoma de Barcelona (UAB), Bellaterra, Spain
| | - Pablo Alonso-Coello
- Iberoamerican Cochrane Centre, Biomedical Research Institute Sant Pau (IIB-Sant Pau), Barcelona, Spain
- CIBER Epidemiología y Salud Pública (CIBERESP), Barcelona, Spain
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15
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Michaëlsson K, Byberg L, Svennblad B, Larsson SC, Baron JA, Melhus H. Serum 25-hydroxyvitamin D is associated with fracture risk only during periods of seasonally high levels in women with a high body mass index. J Bone Miner Res 2021; 36:1957-1966. [PMID: 34173270 DOI: 10.1002/jbmr.4400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Revised: 06/07/2021] [Accepted: 06/22/2021] [Indexed: 11/05/2022]
Abstract
Serum 25-hydroxyvitamin D (S-25OHD) is used to assess vitamin D status and is known to be affected by season and fat mass. Because these factors are often ignored when interpreting S-25OHD, assessment of vitamin D associations with disease outcomes may be distorted. We aimed to investigate the impact of season of blood draw and fat mass on the association of S25OHD with fracture risk. We enrolled 5000 women, mean ± SD age 68 ± 7 years, with dual-energy x-ray absorptiometry (DXA) scans and blood collection in a population-based cohort. Proportional hazards regression, stratified by season and fat mass, was used to determine hazard ratios (HRs) of fracture according to categories of S-25OHD. Our secondary exposures were serum 1,25-dihydroxycholecalciferol (1,25-(OH)2 D3 ), the most active vitamin D metabolite and plasma parathyroid hormone (P-PTH). During an average of 9.2 years of follow-up, 1080 women had a fracture. Women with S-25OHD <30 nmol/L drawn during sunny months (May-October) had a multivariable-adjusted fracture HR of 2.06 (95% CI, 1.27-3.35) compared with those with S-25OHD >60 nmol/L; those with S-25OHD 30-40 nmol/L had an HR of 1.59 (95% CI, 1.12-2.26). In contrast, S-25OHD drawn during November through April was unrelated to fracture risk. The increased risk with low sunny season S-25OHD was seen only among women with body mass index (BMI) ≥25 kg/m2 or fat mass index (FMI) ≥9.8 kg/m2 . High fat mass and low S-25OHD were independently related to lower S-1,25-dihydroxycholecalciferol, which itself predicted fracture risk with samples collected during the sunny season. Irrespective of season, P-PTH was unrelated to fracture risk. We conclude that S-25OHD is associated with fracture risk only if drawn during periods of seasonally high levels in women with a high BMI. These results have implications for the evaluation of vitamin D status and can explain the lack of effect seen with vitamin D supplementation in many fracture trials. © 2021 The Authors. Journal of Bone and Mineral Research published by Wiley Periodicals LLC on behalf of American Society for Bone and Mineral Research (ASBMR).
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Affiliation(s)
- Karl Michaëlsson
- Department of Surgical Sciences, Uppsala University, Uppsala, Sweden
| | - Liisa Byberg
- Department of Surgical Sciences, Uppsala University, Uppsala, Sweden
| | - Bodil Svennblad
- Department of Surgical Sciences, Uppsala University, Uppsala, Sweden
| | - Susanna C Larsson
- Department of Surgical Sciences, Uppsala University, Uppsala, Sweden.,Unit of Cardiovascular and Nutritional EpidemiologyInstitute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - John A Baron
- Department of Surgical Sciences, Uppsala University, Uppsala, Sweden.,Department of Medicine, University of North Carolina School of Medicine, Chapel Hill, North Carolina, USA.,Department of EpidemiologyGillings School of Global Public Health, University of North Carolina, Chapel Hill, North Carolina, USA
| | - Håkan Melhus
- Department of Medical Sciences, Uppsala University, Uppsala, Sweden
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16
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L Bishop E, Ismailova A, Dimeloe S, Hewison M, White JH. Vitamin D and Immune Regulation: Antibacterial, Antiviral, Anti-Inflammatory. JBMR Plus 2021; 5:e10405. [PMID: 32904944 PMCID: PMC7461279 DOI: 10.1002/jbm4.10405] [Citation(s) in RCA: 108] [Impact Index Per Article: 36.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Accepted: 08/05/2020] [Indexed: 02/06/2023] Open
Abstract
Regulation of immune function continues to be one of the most well-recognized extraskeletal actions of vitamin D. This stemmed initially from the discovery that antigen presenting cells such as macrophages could actively metabolize precursor 25-hydroxyvitamin D (25D) to active 1,25-dihydroxyvitamin D (1,25D). Parallel observation that activated cells from the immune system expressed the intracellular vitamin D receptor (VDR) for 1,25D suggested a potential role for vitamin D as a localized endogenous modulator of immune function. Subsequent studies have expanded our understanding of how vitamin D exerts effects on both the innate and adaptive arms of the immune system. At an innate level, intracrine synthesis of 1,25D by macrophages and dendritic cells stimulates expression of antimicrobial proteins such as cathelicidin, as well as lowering intracellular iron concentrations via suppression of hepcidin. By potently enhancing autophagy, 1,25D may also play an important role in combatting intracellular pathogens such as M. tuberculosis and viral infections. Local synthesis of 1,25D by macrophages and dendritic cells also appears to play a pivotal role in mediating T-cell responses to vitamin D, leading to suppression of inflammatory T helper (Th)1 and Th17 cells, and concomitant induction of immunotolerogenic T-regulatory responses. The aim of this review is to provide an update on our current understanding of these prominent immune actions of vitamin D, as well as highlighting new, less well-recognized immune effects of vitamin D. The review also aims to place this mechanistic basis for the link between vitamin D and immunity with studies in vivo that have explored a role for vitamin D supplementation as a strategy for improved immune health. This has gained prominence in recent months with the global coronavirus disease 2019 health crisis and highlights important new objectives for future studies of vitamin D and immune function. © 2020 The Authors. JBMR Plus published by Wiley Periodicals LLC on behalf of American Society for Bone and Mineral Research.
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Affiliation(s)
- Emma L Bishop
- Institute of Immunology and ImmunotherapyUniversity of BirminghamBirminghamUK
| | - Aiten Ismailova
- Department of PhysiologyMcGill UniversityMontrealQuebecCanada
| | - Sarah Dimeloe
- Institute of Immunology and ImmunotherapyUniversity of BirminghamBirminghamUK
- Metabolism and Systems ResearchUniversity of BirminghamBirminghamUK
| | - Martin Hewison
- Metabolism and Systems ResearchUniversity of BirminghamBirminghamUK
| | - John H White
- Department of PhysiologyMcGill UniversityMontrealQuebecCanada
- Department of MedicineMcGill UniversityMontrealQuebecCanada
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Abstract
OBJECTIVE The aim of the present study was to develop and validate a vitamin D FFQ for assessment of dietary vitamin D intake in healthy adults in England, UK. DESIGN The current study assessed the agreement between a four-day food diary (4 d-FD) and a new vitamin D FFQ to measure dietary intake of vitamin D. Dietary intake was estimated using Nutritics dietary analysis software, and Spearman's and Bland-Altman tests were utilised to assess correlation and agreement, respectively. Participants also provided a blood sample for plasma analysis of vitamin D concentrations. SETTING Home setting. PARTICIPANTS Fifty participants were recruited to the study from the University of Chester and vicinity. RESULTS Results showed a strong correlation between vitamin D intake recorded by the FFQ and the 4 d-FD (r = 0·609; P < 0·0001) within 95 % limits of agreement. Furthermore, a significant correlation between plasma 25(OH)D concentrations and vitamin D intake measured by the FFQ (r = 0·290, P = 0·041) and the 4 d-FD (r = 0·360, P = 0·01) was observed. CONCLUSION Our analysis suggests this FFQ is a useful and rapid tool for researchers and health professionals to assess vitamin D dietary intakes in healthy adults in the UK.
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18
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Pagels P, Wester U, Mårtensson F, Guban P, Raustorp A, Fröberg A, Söderström M, Boldemann C. Pupils' use of school outdoor play settings across seasons and its relation to sun exposure and physical activity. PHOTODERMATOLOGY PHOTOIMMUNOLOGY & PHOTOMEDICINE 2020; 36:365-372. [PMID: 32187730 DOI: 10.1111/phpp.12558] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Revised: 02/24/2020] [Accepted: 03/14/2020] [Indexed: 12/29/2022]
Abstract
BACKGROUND Long outdoor stay may cause hazardous exposure to ultraviolet radiation (UVR) from the sun even at high latitudes as in Sweden (Spring to Autumn). On the other hand, long outdoor stay is a strong predictor of primary school children´s free mobility involving moderate to vigorous physical activity (MVPA). UV-protective outdoor environments enable long outdoor stay. We investigated the concurrent impact of different school outdoor play settings upon pupils´ sun exposure and levels of physical activity across different ages, genders, and seasons. METHOD During 1 week each in September, March, and May, UVR exposure and MVPA were measured in pupils aged 7-11 years. Erythemally effective UVR exposure was measured by polysulphone film dosimeters and MVPA by accelerometers. Schoolyard play was recorded on maps, and used areas defined as four play settings (fixed play equipment, paved surfaces, sport fields, and green settings), categorized by season and gender. RESULTS During the academic year, sport fields yielded the highest UVR exposures and generated most time in MVPA. In March, time outdoors and minutes in MVPA dropped and UVR exposures were suberythemal at all play settings. In May, green settings and fixed play equipment close to greenery promoted MVPA and protected from solar overexposure during long outdoor stays. CONCLUSION More outdoor activities in early spring are recommended. In May, greenery attractive for play could protect against overexposure to UVR and stimulate both girls and boys to vigorous play.
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Affiliation(s)
- Peter Pagels
- Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden.,Department of Sport Sciences, Linneaus University, Kalmar, Sweden
| | - Ulf Wester
- Swedish Radiation Safety Authority, Stockholm, Sweden
| | - Fredrika Mårtensson
- Department of Work science, Business Economics and Environmental Psychology, Swedish University of Agricultural Sciences, Alnarp, Sweden
| | - Peter Guban
- Center for Epidemiology and Community Medicine, Stockholm County Council, Stockholm, Sweden
| | - Anders Raustorp
- Department of Food and Nutrition and Sport Science, University of Gothenburg, Gothenburg, Sweden
| | - Andreas Fröberg
- Department of Food and Nutrition and Sport Science, University of Gothenburg, Gothenburg, Sweden
| | - Margareta Söderström
- Section of General Practice, Department of Public Health, University of Copenhagen, Copenhagen, Denmark.,Department of Clinical Sciences in Lund, University of Lund, Lund, Sweden
| | - Cecilia Boldemann
- Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden
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19
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Choi SI, Jung TD, Cho BY, Choi SH, Sim WS, Han X, Lee SJ, Kim YC, Lee OH. Anti‑photoaging effect of fermented agricultural by‑products on ultraviolet B‑irradiated hairless mouse skin. Int J Mol Med 2019; 44:559-568. [PMID: 31198982 PMCID: PMC6605975 DOI: 10.3892/ijmm.2019.4242] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2019] [Accepted: 06/10/2019] [Indexed: 12/20/2022] Open
Abstract
Processed products from agricultural produce generate a large number of agricultural by‑products that contain a number of functional substances. These are often discarded owing to the lack of suitable processing methods. The present study investigated the anti‑photoaging properties of fermented rice bran (FRB), soybean cake (FSB) and sesame seed cake (FSC) on ultraviolet B (UVB)‑irradiated hairless mouse skin. Results indicated that the oral administration of FRB, FSB and FSC effectively inhibited the UVB irradiation‑induced expression of matrix metalloproteinase (MMP)‑2, MMP‑9, MMP‑3 and MMP‑13. Reverse transcription‑quantitative polymerase chain reaction results also demonstrated that FRB, FSB and FSC significantly inhibited the UVB‑induced expression of the genes encoding tumor necrosis factor‑α, inducible nitric oxide synthase, interleukin (IL)‑6 and IL‑1β when compared with the UVB‑vehicle group (P<0.05). Additionally, collagen degradation and mast cell infiltration were reduced in hairless mouse skin. Furthermore, UVB‑induced wrinkle formation was also significantly reduced in mouse skin compared with the UVB‑vehicle group (P<0.05). These results reveal that fermented agricultural by‑products may serve as potential functional materials with anti‑photoaging activities.
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Affiliation(s)
- Sun-Il Choi
- Department of Food Science and Biotechnology, Kangwon National University, Chuncheon 24341
| | - Tae-Dong Jung
- Department of Food Science and Biotechnology, Kangwon National University, Chuncheon 24341
| | - Bong-Yeon Cho
- Department of Food Science and Biotechnology, Kangwon National University, Chuncheon 24341
| | - Seung-Hyun Choi
- Department of Food Science and Biotechnology, Kangwon National University, Chuncheon 24341
| | - Wan-Sup Sim
- Department of Food Science and Biotechnology, Kangwon National University, Chuncheon 24341
| | - Xionggao Han
- Department of Food Science and Biotechnology, Kangwon National University, Chuncheon 24341
| | - Sang Jong Lee
- STR Biotech Co., Ltd., Chuncheon 24232, Republic of Korea
| | - Young-Cheul Kim
- Department of Nutrition, University of Massachusetts, Amherst, MA 01003, USA
| | - Ok-Hwan Lee
- Department of Food Science and Biotechnology, Kangwon National University, Chuncheon 24341
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20
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Igoe DP, Amar A, Schouten P, Parisi AV, Turner J. Assessment of Biologically Effective Solar Ultraviolet Exposures for Court Staff and Competitors During a Major Australian Tennis Tournament. Photochem Photobiol 2019; 95:1461-1467. [DOI: 10.1111/php.13132] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Revised: 06/09/2019] [Accepted: 06/10/2019] [Indexed: 01/05/2023]
Affiliation(s)
- Damien P. Igoe
- Faculty of Health, Environment and Sciences University of Southern Queensland Toowoomba Qld Australia
| | - Abdurazaq Amar
- Faculty of Health, Environment and Sciences University of Southern Queensland Toowoomba Qld Australia
| | - Peter Schouten
- Faculty of Health, Environment and Sciences University of Southern Queensland Toowoomba Qld Australia
| | - Alfio V. Parisi
- Faculty of Health, Environment and Sciences University of Southern Queensland Toowoomba Qld Australia
| | - Joanna Turner
- Faculty of Health, Environment and Sciences University of Southern Queensland Toowoomba Qld Australia
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Wollweber M, Roth B. Raman Sensing and Its Multimodal Combination with Optoacoustics and OCT for Applications in the Life Sciences. SENSORS (BASEL, SWITZERLAND) 2019; 19:E2387. [PMID: 31137716 PMCID: PMC6566696 DOI: 10.3390/s19102387] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 05/10/2019] [Accepted: 05/15/2019] [Indexed: 12/29/2022]
Abstract
Currently, many optical modalities are being investigated, applied, and further developed for non-invasive analysis and sensing in the life sciences. To befit the complexity of the study objects and questions in this field, the combination of two or more modalities is attempted. We review our work on multimodal sensing concepts for applications ranging from non-invasive quantification of biomolecules in the living organism to supporting medical diagnosis showing the combined capabilities of Raman spectroscopy, optical coherence tomography, and optoacoustics.
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Affiliation(s)
- Merve Wollweber
- Laser Zentrum Hannover e.V., Industrial and Biomedical Optics Department, Hollerithallee 8, 30419 Hannover, Germany.
- Hannover Centre for Optical Technologies, Leibniz University Hannover, Nienburger Str. 17, 30167 Hannover, Germany.
| | - Bernhard Roth
- Hannover Centre for Optical Technologies, Leibniz University Hannover, Nienburger Str. 17, 30167 Hannover, Germany.
- Cluster of Excellence PhoenixD, Leibniz University Hannover, Welfengarten 1, 30167 Hannover, Germany.
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22
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Fayet-Moore F, Brock KE, Wright J, Ridges L, Small P, Seibel MJ, Conigrave AD, Mason RS. Determinants of vitamin D status of healthy office workers in Sydney, Australia. J Steroid Biochem Mol Biol 2019; 189:127-134. [PMID: 30831196 DOI: 10.1016/j.jsbmb.2019.02.017] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Revised: 02/06/2019] [Accepted: 02/28/2019] [Indexed: 01/04/2023]
Abstract
Low vitamin D status, measured as 25-hydroxyvitamin D (25OHD), has been linked to increased risk of osteoporosis and other disorders. Due to the indoor nature of office work, there may be an increased risk of 25OHD deficiency in this group. The aim of the current study was to evaluate seasonal variations of 25OHD in a population of healthy office workers, and to assess the effect of sun exposure behaviour, skin pigmentation, physical activity (PA) and dietary intake on serum 25OHD concentrations. We assessed the vitamin D status of healthy office workers in Sydney, Australia, at the end of summer (n = 103) and then at the end of winter (n = 71). Data on anthropometry, PA, dietary intake, sun exposure and skin phototype were collected along with blood samples. Serum 25OHD was measured by radioimmunoassay. Mean 25OHD concentration in late summer was 68 ± 27 nmol/L (range: 24-160 nmol/L), and in late winter was 59 ± 32 nmol/L (range: 15-174 nmol/L). 25OHD deficiency (<50 nmol/L) was observed in 29% and 42% of participants at end-summer and end-winter, respectively. Almost 10% of individuals were extremely deficient (<25 nmol/L) at end-winter, particularly those with dark skin (phototypes 5 and 6). Independent predictors of end-summer 25OHD were skin phototype (p < 0.02), summer sun exposure (p < 0.001) and skin area exposed (p = 0.005). The strongest predictor of end-winter 25OHD was end-summer 25OHD concentration (p < 0.001). If this was excluded from the model, the independent predictors of end-winter 25OHD were skin phototype (p < 0.01), sun exposure in winter (p = 0.01) and oily fish consumption (p < 0.05). Sunscreen use was significantly associated with higher vitamin D status (p < 0.05) as those who used sunscreen were also more likely to spend time outdoors. We conclude that sun exposure is beneficial for vitamin D status even with sunscreen use. Vitamin D supplements should be targeted to individuals who are darker skinned or unable to obtain adequate sun exposure, particularly during the winter months.
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Affiliation(s)
- Flavia Fayet-Moore
- School of Molecular Bioscience, University of Sydney, NSW, 2006, Australia; Nutrition Research Australia, Sydney NSW, 2000, Australia
| | - Kaye E Brock
- Faculty of Health Sciences, University of Sydney, NSW, 2006, Australia; Physiology, School of Medical Sciences, University of Sydney, NSW, 2006, Australia
| | - Jutta Wright
- Nestlé Australia Ltd., Rhodes NSW, 2138, Australia
| | - Leisa Ridges
- Nestlé Australia Ltd., Rhodes NSW, 2138, Australia
| | | | - Markus J Seibel
- Bone Research Program, ANZAC Research Institute, University of Sydney, NSW, 2006, Australia
| | - Arthur D Conigrave
- School of Molecular Bioscience, University of Sydney, NSW, 2006, Australia; Bosch Institute for Medical Research, University of Sydney, NSW, 2006, Australia
| | - Rebecca S Mason
- Bosch Institute for Medical Research, University of Sydney, NSW, 2006, Australia; Physiology, School of Medical Sciences, University of Sydney, NSW, 2006, Australia.
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Changes in Vitamin D Status in Overweight Middle-Aged Adults with or without Impaired Glucose Metabolism in Two Consecutive Nordic Summers. J Nutr Metab 2019; 2019:1840374. [PMID: 30944737 PMCID: PMC6421780 DOI: 10.1155/2019/1840374] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2018] [Accepted: 01/02/2019] [Indexed: 12/31/2022] Open
Abstract
Background Sun exposure is the main driver of vitamin D synthesis. High latitude, obesity, and type 2 diabetes mellitus (T2DM) are all risk factors for vitamin D deficiency. However, the seasonal variation in vitamin D concentrations (25[OH]D) in such populations before and after sun exposure during the summer is unknown. Therefore, we investigated 25[OH]D status before and after two consecutive summers in high latitude and its associations with body fat, sex, and glucose metabolism. Methods 158 participants from Sweden (87 women, 71 men; mean age, 60 ± 5 y; body mass index ≥ 25 kg/m2) and 25[OH]D were measured and evaluated in relation to normal or impaired glucose tolerance, body composition, and dietary habits during summer season. Results Eighty-four percent of the participants were categorized with low to deficient 25[OH]D values before summer (55.1 ± 21.7 nmol·L−1), with a significant increase after the summer season (66.3 ± 21.0 nmol·L−1; P < 0.001). However, the values remained below the recommended range (76–250 nmol·L−1) in 66% of the participants. These findings were verified in a subgroup of the study population during the subsequent summer. Participants who reported use of vitamin D supplements had higher initial concentrations (64.2 ± 20.1 nmol·L−1) compared to nonusers (53.7 ± 21.7 nmol·L−1; P=0.04). Further, 25[OH]D values correlated negatively with fat mass (kg) prior to summer only in the female population (r=−0.29, P=0.008). Conclusions In the present study, sun exposure had a beneficial but insufficient effect on 25[OH]D levels, and the same levels were documented in two consecutive summer seasons, confirming that vitamin D supplementation in both summer and winter should be considered in this population.
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Alkoot MJ, Boland F, Brugha R, Biesma R. The prevalence and risk factors of vitamin D inadequacy among male athletes in Kuwait: A cross-sectional study. J Steroid Biochem Mol Biol 2019; 187:76-81. [PMID: 30412765 DOI: 10.1016/j.jsbmb.2018.11.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Revised: 10/15/2018] [Accepted: 11/05/2018] [Indexed: 11/17/2022]
Abstract
The aim of this study was to determine the prevalence of vitamin D inadequacy in male athletes living in Kuwait, and to assess its relationship with possible risk factors including body composition, lifestyle and fasting Ramadan. A Cross- sectional study was conducted on a total of 250 male athletes registered in official sports clubs in Kuwait were included. Blood tests, anthropometric measurements and a lifestyle questionnaire were performed. Serum 25(OH)D level was used as a measure of vitamin D status. Vitamin D inadequacy was defined as serum 25(OH)D < 75 nmol/L, inadequate levels were further classified as vitamin D insufficiency (50-75 nmol/L), vitamin D deficiency (<50 nmol/L) and severe deficiency (<25 nmol/L). Thirty-six percent of the sample were football players, 13% were futsal players and the rest were players of 15 different outdoor and indoor sports. A prevalence of 83% of vitamin D inadequacy (< 75 nmol/L) was observed in male athletes in Kuwait, of which 23% had severe deficiency (< 25 nmol/L). The prevalence increased from 80% (n = 130) before Ramadan to 90% (n = 79) after Ramadan. There was a significant positive association between serum 25(OH)D concentrations and vitamin D intake (p < 0.001). Serum 25(OH)D concentrations were significantly inversely associated with risk of injuries (p = 0.008) and with the concentrations of parathyroid hormone (PTH) (p = 0.029). No statistically significant associations between 25(OH)D concentrations and sun exposure, physical activity or anthropometric levels were found. Similar to other studies in the Middle East, we found that healthy male athletes in Kuwait have a high prevalence of vitamin D inadequacy. The results of this study suggest the need for regular supplement intake and vitamin D awareness campaigns for athletes in Kuwait. More research is needed to assess the effect of Ramadan.
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Affiliation(s)
- Meshari J Alkoot
- Jaber Al Ahmad Armed Forces Hospital, Department of Medicine, Kuwait; Royal College of Surgeons in Ireland, Department of Epidemiology and Public Health Medicine, Dublin, Ireland.
| | - Fiona Boland
- Division of Population Health Sciences, Royal College of Surgeons in Ireland, Dublin, Ireland.
| | - Ruairi Brugha
- Royal College of Surgeons in Ireland, Department of Epidemiology and Public Health Medicine, Dublin, Ireland.
| | - Regien Biesma
- Royal College of Surgeons in Ireland, Department of Epidemiology and Public Health Medicine, Dublin, Ireland.
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Zamzam D, Foad M, Swelam M, AbdelHafez M, AbdelNasser A, Mahmoud R, Aref H, Zakaria M. Vitamin D and body mass index in Egyptian multiple sclerosis patients. Mult Scler Relat Disord 2019; 28:313-316. [DOI: 10.1016/j.msard.2018.11.035] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2018] [Revised: 11/13/2018] [Accepted: 11/30/2018] [Indexed: 11/26/2022]
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Ray TR, Choi J, Bandodkar AJ, Krishnan S, Gutruf P, Tian L, Ghaffari R, Rogers JA. Bio-Integrated Wearable Systems: A Comprehensive Review. Chem Rev 2019; 119:5461-5533. [PMID: 30689360 DOI: 10.1021/acs.chemrev.8b00573] [Citation(s) in RCA: 413] [Impact Index Per Article: 82.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Bio-integrated wearable systems can measure a broad range of biophysical, biochemical, and environmental signals to provide critical insights into overall health status and to quantify human performance. Recent advances in material science, chemical analysis techniques, device designs, and assembly methods form the foundations for a uniquely differentiated type of wearable technology, characterized by noninvasive, intimate integration with the soft, curved, time-dynamic surfaces of the body. This review summarizes the latest advances in this emerging field of "bio-integrated" technologies in a comprehensive manner that connects fundamental developments in chemistry, material science, and engineering with sensing technologies that have the potential for widespread deployment and societal benefit in human health care. An introduction to the chemistries and materials for the active components of these systems contextualizes essential design considerations for sensors and associated platforms that appear in following sections. The subsequent content highlights the most advanced biosensors, classified according to their ability to capture biophysical, biochemical, and environmental information. Additional sections feature schemes for electrically powering these sensors and strategies for achieving fully integrated, wireless systems. The review concludes with an overview of key remaining challenges and a summary of opportunities where advances in materials chemistry will be critically important for continued progress.
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Affiliation(s)
- Tyler R Ray
- Northwestern University , 2145 Sheridan Road , Evanston , Illinois 60208 , United States
| | - Jungil Choi
- Northwestern University , 2145 Sheridan Road , Evanston , Illinois 60208 , United States
| | - Amay J Bandodkar
- Northwestern University , 2145 Sheridan Road , Evanston , Illinois 60208 , United States
| | - Siddharth Krishnan
- Northwestern University , 2145 Sheridan Road , Evanston , Illinois 60208 , United States
| | - Philipp Gutruf
- Department of Biomedical Engineering University of Arizona Tucson , Arizona 85721 , United States
| | - Limei Tian
- Department of Biomedical Engineering , Texas A&M University , College Station , Texas 77843 , United States
| | - Roozbeh Ghaffari
- Northwestern University , 2145 Sheridan Road , Evanston , Illinois 60208 , United States
| | - John A Rogers
- Northwestern University , 2145 Sheridan Road , Evanston , Illinois 60208 , United States
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Tarlinton RE, Khaibullin T, Granatov E, Martynova E, Rizvanov A, Khaiboullina S. The Interaction between Viral and Environmental Risk Factors in the Pathogenesis of Multiple Sclerosis. Int J Mol Sci 2019; 20:ijms20020303. [PMID: 30646507 PMCID: PMC6359439 DOI: 10.3390/ijms20020303] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2018] [Revised: 01/09/2019] [Accepted: 01/10/2019] [Indexed: 12/18/2022] Open
Abstract
Multiple sclerosis (MS) is a chronic debilitating inflammatory disease of unknown ethology targeting the central nervous system (CNS). MS has a polysymptomatic onset and is usually first diagnosed between the ages of 20–40 years. The pathology of the disease is characterized by immune mediated demyelination in the CNS. Although there is no clinical finding unique to MS, characteristic symptoms include sensory symptoms visual and motor impairment. No definitive trigger for the development of MS has been identified but large-scale population studies have described several epidemiological risk factors for the disease. This list is a confusing one including latitude, vitamin D (vitD) levels, genetics, infection with Epstein Barr Virus (EBV) and endogenous retrovirus (ERV) reactivation. This review will look at the evidence for each of these and the potential links between these disparate risk factors and the known molecular disease pathogenesis to describe potential hypotheses for the triggering of MS pathology.
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Affiliation(s)
| | - Timur Khaibullin
- Republican Clinical Neurological Center, Republic of Tatarstan, Kazan 420021, Russia.
| | - Evgenii Granatov
- Republican Clinical Neurological Center, Republic of Tatarstan, Kazan 420021, Russia.
| | - Ekaterina Martynova
- Department of Gene and Cell Technology, Institute of Fundamental Medicine and Biology, Republic of Tatarstan, Kazan 420021, Russia.
| | - Albert Rizvanov
- Department of Gene and Cell Technology, Institute of Fundamental Medicine and Biology, Republic of Tatarstan, Kazan 420021, Russia.
| | - Svetlana Khaiboullina
- Department of Gene and Cell Technology, Institute of Fundamental Medicine and Biology, Republic of Tatarstan, Kazan 420021, Russia.
- Department of Microbiology and Immunology, University of Nevada, Reno, NV 89557, USA.
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Association of Vitamin D Status with Body Mass Index in Adolescents in Ukraine. ROMANIAN JOURNAL OF DIABETES NUTRITION AND METABOLIC DISEASES 2018. [DOI: 10.2478/rjdnmd-2018-0045] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Abstract
Background and aims: Vitamin D status in many health managements have been researched extensively, but its dependence with obesity still remains controversial. This article is devoted to examination of blood cholecalciferol levels in Ukrainian population with establishment the association of cholecalciferol levels and body mass index (BMI). Materials and methods: For this observed investigation, data were collected during the summer 2017, over a period of one week from three township areas in Carpathian region, Ukraine from 304 adults aged 19-78 years. Measured variables contained 25(OH)D level, weight and weight applied to check BMI degree. The average level of vitamin D among adolescents presented 23.1 ± 8.2 ng/ml. Female gender was associated with lower vitamin D concentrations (22.9 ± 9.3 ng/ml vs. 26.2 ± 8.5 ng/ml for men). Among the participants, 74.4% had a BMNI of 25 kg/m2 and over, and in 27.3% of them the number was 30 kg/m2 and over. Results: Violation of vitamin D status was detected in 90.5% persons. 1.8% people had been identified as severe 25(OH)D deficiency. Measurement of cholecalciferol demonstrated meaningful connection between its level and BMI only in persons with BMI 25-29.9 kg/m2. Average vitamin D concentrations in persons with BMI over30 kg/m2 did not vary to a significant range from data in persons with normal body weight. Conclusions: Vitamin D status among the adolescents in Ukraine is far from optimum. Our results confirm reliable association between cholecalciferol level and BMI in persons with overweight. Interchange between conservation of vitamin D and BMI needs additional surveys.
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29
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Webb A. Assessing benefits and risks of holiday sun exposure in children. Br J Dermatol 2018; 179:822-823. [DOI: 10.1111/bjd.16910] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- A.R. Webb
- Centre for Atmospheric Sciences; School of Earth and Environmental Sciences; University of Manchester; Manchester U.K
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30
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Turner J, Parisi AV. Ultraviolet Radiation Albedo and Reflectance in Review: The Influence to Ultraviolet Exposure in Occupational Settings. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2018; 15:E1507. [PMID: 30018236 PMCID: PMC6069363 DOI: 10.3390/ijerph15071507] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Revised: 07/13/2018] [Accepted: 07/13/2018] [Indexed: 11/29/2022]
Abstract
Ultraviolet (UV) albedo and UV reflectance are defined, compared and contrasted, to explain their roles and place in studies focusing on UV radiation and exposure measurements, in the context of localised albedo measurement and human UV exposure studies. This review recommends that the term UV albedo be used when investigating natural horizontal surfaces when the albedo is not known to change significantly over time. The term UV reflectance should be mostly used for non-natural surfaces and non-horizontal measurements and will change with respect to the geometry of the irradiances reflected and received, and due to the intrinsic nature of the surface itself. UV albedo measurements made in the literature have been compiled, in both broadband and spectral UV albedo measurements. Broadband measurements have been tabulated and spectral UV measurements have been displayed visually. The methodology of measurements is briefly discussed. Finally, studies that consider how high albedo or reflectance sites influence UV exposure are reviewed. It was concluded that there is currently no known relationship between the albedo or reflectance of a surface and the resulting influence it has on individual UV exposure. This presents an opportunity for researchers to continue exploring the influence of reflective UV surfaces.
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Affiliation(s)
- Joanna Turner
- Faculty of Health Engineering and Sciences, University of Southern Queensland, Toowoomba 4350, Australia.
| | - Alfio V Parisi
- Faculty of Health Engineering and Sciences, University of Southern Queensland, Toowoomba 4350, Australia.
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Webb AR, Kazantzidis A, Kift RC, Farrar MD, Wilkinson J, Rhodes LE. Meeting Vitamin D Requirements in White Caucasians at UK Latitudes: Providing a Choice. Nutrients 2018; 10:E497. [PMID: 29673142 PMCID: PMC5946282 DOI: 10.3390/nu10040497] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Revised: 04/11/2018] [Accepted: 04/12/2018] [Indexed: 12/25/2022] Open
Abstract
The body gains vitamin D through both oral intake (diet/supplementation) and synthesis in skin upon exposure to ultraviolet radiation (UVR). Sun exposure is the major source for most people even though sun exposure is complex and limited by climate and culture. We aimed to quantify the sun exposure required to meet vitamin D targets year-round and determine whether this can be safely achieved in a simply defined manner in the UK as an alternative to increasing vitamin D oral intake. Data from observation (sun exposure, diet, and vitamin D status) and UVR intervention studies performed with white Caucasian adults were combined with modeled all-weather UVR climatology. Daily vitamin D effective UVR doses (all-weather) were calculated across the UK based on ten-year climatology for pre-defined lunchtime exposure regimes. Calculations then determined the time necessary to spend outdoors for the body to gain sufficient vitamin D levels for year-round needs without being sunburnt under differing exposure scenarios. Results show that, in specified conditions, white Caucasians across the UK need nine minutes of daily sunlight at lunchtime from March to September for 25(OH)D levels to remain ≥25 nmol/L throughout the winter. This assumes forearms and lower legs are exposed June-August, while in the remaining, cooler months only hands and face need be exposed. Exposing only the hands and face throughout the summer does not meet requirements.
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Affiliation(s)
- Ann R Webb
- School of Earth and Environmental Science, Faculty of Science and Engineering, University of Manchester, Manchester M13 9PL, UK.
| | - Andreas Kazantzidis
- School of Earth and Environmental Science, Faculty of Science and Engineering, University of Manchester, Manchester M13 9PL, UK.
- Physics Department, University of Patras, 265 00 Patras, Greece.
| | - Richard C Kift
- School of Earth and Environmental Science, Faculty of Science and Engineering, University of Manchester, Manchester M13 9PL, UK.
| | - Mark D Farrar
- Faculty of Biology, Medicine and Health, University of Manchester, and Dermatology Centre, Salford Royal NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester M6 8HD, UK.
| | - Jack Wilkinson
- Centre for Biostatistics, School of Health Sciences, Faculty of Biology, Medicine and Health, Manchester Academic Health Science Centre (MAHSC), University of Manchester, Manchester M13 9PL, UK.
| | - Lesley E Rhodes
- Faculty of Biology, Medicine and Health, University of Manchester, and Dermatology Centre, Salford Royal NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester M6 8HD, UK.
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Mohania D, Chandel S, Kumar P, Verma V, Digvijay K, Tripathi D, Choudhury K, Mitten SK, Shah D. Ultraviolet Radiations: Skin Defense-Damage Mechanism. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 996:71-87. [PMID: 29124692 DOI: 10.1007/978-3-319-56017-5_7] [Citation(s) in RCA: 113] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
UV-radiations are the invisible part of light spectra having a wavelength between visible rays and X-rays. Based on wavelength, UV rays are subdivided into UV-A (320-400 nm), UV-B (280-320 nm) and UV-C (200-280 nm). Ultraviolet rays can have both harmful and beneficial effects. UV-C has the property of ionization thus acting as a strong mutagen, which can cause immune-mediated disease and cancer in adverse cases. Numbers of genetic factors have been identified in human involved in inducing skin cancer from UV-radiations. Certain heredity diseases have been found susceptible to UV-induced skin cancer. UV radiations activate the cutaneous immune system, which led to an inflammatory response by different mechanisms. The first line of defense mechanism against UV radiation is melanin (an epidermal pigment), and UV absorbing pigment of skin, which dissipate UV radiation as heat. Cell surface death receptor (e.g. Fas) of keratinocytes responds to UV-induced injury and elicits apoptosis to avoid malignant transformation. In addition to the formation of photo-dimers in the genome, UV also can induce mutation by generating ROS and nucleotides are highly susceptible to these free radical injuries. Melanocortin 1 receptor (MC1R) has been known to be implicated in different UV-induced damages such as pigmentation, adaptive tanning, and skin cancer. UV-B induces the formation of pre-vitamin D3 in the epidermal layer of skin. UV-induced tans act as a photoprotection by providing a sun protection factor (SPF) of 3-4 and epidermal hyperplasia. There is a need to prevent the harmful effects and harness the useful effects of UV radiations.
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Affiliation(s)
- Dheeraj Mohania
- Dr. Rajendra Prasad Centre for Ophthalmic Sciences, All India Institute of Medial Sciences (AIIMS), Ansari Nagar, New Delhi, India.
| | - Shikha Chandel
- Department of Research, Sir Ganga Ram Hospital (SGRH), New Delhi, India
| | - Parveen Kumar
- Dr. B.R. Ambedkar Centre for Biomedical Research, University of Delhi, (North Campus), New Delhi, India
| | - Vivek Verma
- Dr. B.R. Ambedkar Centre for Biomedical Research, University of Delhi, (North Campus), New Delhi, India
| | - Kumar Digvijay
- Department of Research, Sir Ganga Ram Hospital (SGRH), New Delhi, India
| | - Deepika Tripathi
- Department of Research, Sir Ganga Ram Hospital (SGRH), New Delhi, India
| | | | | | - Dilip Shah
- Drexel University College of Medicine, Philadelphia, PA, USA
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Hoseinzadeh E, Taha P, Wei C, Godini H, Ashraf GM, Taghavi M, Miri M. The impact of air pollutants, UV exposure and geographic location on vitamin D deficiency. Food Chem Toxicol 2018; 113:241-254. [DOI: 10.1016/j.fct.2018.01.052] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Revised: 01/18/2018] [Accepted: 01/29/2018] [Indexed: 12/16/2022]
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34
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Nioi A, Wendelboe-Nelson C, Cowan S, Cowie H, Rashid S, Ritchie P, Cherrie M, Lansdown TC, Cherrie JW. A randomised control crossover trial of a theory based intervention to improve sun-safe and healthy behaviours in construction workers: study protocol. BMC Public Health 2018; 18:259. [PMID: 29448922 PMCID: PMC5815245 DOI: 10.1186/s12889-018-5164-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2017] [Accepted: 02/07/2018] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Exposure to sunlight can have both positive and negative health impacts. Excessive exposure to ultra-violet (UV) radiation from the sun can cause skin cancer, however insufficient exposure to sunlight has a detrimental effect on production of Vitamin D. In the construction industry there are onsite proactive behaviours for safety, but sun-safety remains a low priority. There is limited research on understanding the barriers to adopting sun-safe behaviours and the association this may have with Vitamin D production. This paper reports a protocol for an intervention study, using text messaging in combination with a supportive smartphone App. The intervention aims to both reduce UV exposure during months with higher UV levels and promote appropriate dietary changes to boost Vitamin D levels during months with low UV levels. METHOD/DESIGN Approximately 60 construction workers will be recruited across the United Kingdom. A randomised control crossover trial (RCCT) will be used to test the intervention, with randomisation at site level - i.e. participants will receive both the control (no text messages or supportive App support) and intervention (daily text messages and supportive App). Using the Theory of Planned Behaviour (TPB) the intervention focuses on supporting sun-safety and healthy dietary decisions in relation to Vitamin D intake. The intervention emphasises cultivating the perception of normative support in the workplace, increasing awareness of control and self-efficacy in taking sun-protective behaviours, making healthier eating choices to boost Vitamin D, and tackling stigmas attached to image and group norms. Each study epoch will last 21 days with intervention text messages delivered on workdays only. The supportive App will provide supplementary information about sun protective behaviours and healthy dietary choices. The primary outcome measure is 25-hydroxy-Vitamin D [25(OH)D] level (obtained using blood spot sampling), which will be taken pre and post control and intervention periods. Secondary outcome measures are two-fold, (1) using the TPB to detect changes in behaviour, and (2) quantifying UV exposure during the UK peak radiation season (April-September) using body-mounted UV sensors. DISCUSSION This study will provide important information about the effectiveness of a technology-based intervention to promote sun-safety and healthy behaviours in outdoor construction workers. TRIAL REGISTRATION ISRCTN15888934 retrospectively registered 15.01.2018.
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Affiliation(s)
- Amanda Nioi
- Heriot-Watt University, School of Engineering and Physical Sciences, Institute of Biological Chemistry, Biophysics and Bioengineering, Edinburgh, EH14 4AS, UK.
| | - Charlotte Wendelboe-Nelson
- Heriot-Watt University, School of Engineering and Physical Sciences, Institute of Biological Chemistry, Biophysics and Bioengineering, Edinburgh, EH14 4AS, UK
| | - Sue Cowan
- Heriot Watt University, School of Social Sciences, Department of Psychology, Edinburgh, EH14 4AS, UK
| | - Hilary Cowie
- Institute of Occupational Medicine, Research Avenue North, Edinburgh, EH14 4AP, UK
| | - Shahzad Rashid
- Institute of Occupational Medicine, Research Avenue North, Edinburgh, EH14 4AP, UK
| | - Peter Ritchie
- Institute of Occupational Medicine, Research Avenue North, Edinburgh, EH14 4AP, UK
| | - Mark Cherrie
- University of Edinburgh, Centre for Research on Environment, Society and Health, School of Geosciences, Edinburgh, EH8 9XP, UK
| | - Terry C Lansdown
- Heriot Watt University, School of Social Sciences, Department of Psychology, Edinburgh, EH14 4AS, UK
| | - John W Cherrie
- Heriot-Watt University, School of Engineering and Physical Sciences, Institute of Biological Chemistry, Biophysics and Bioengineering, Edinburgh, EH14 4AS, UK.,Institute of Occupational Medicine, Research Avenue North, Edinburgh, EH14 4AP, UK
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Greene-Finestone LS, Garriguet D, Brooks S, Langlois K, Whiting SJ. Overweight and obesity are associated with lower vitamin D status in Canadian children and adolescents. Paediatr Child Health 2017; 22:438-444. [PMID: 29479261 PMCID: PMC5804960 DOI: 10.1093/pch/pxx116] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
INTRODUCTION There is evidence that 25-hydroxyvitamin D levels are lower in overweight and obese youth. This study examined the relationship between weight status and 25-hydroxyvitamin D, while controlling for confounders, in Canadian youth. METHODS Plasma 25-hydroxyvitamin D from subjects aged 6 to 17 years from the Canadian Health Measures Survey cycles 1 (2007 to 2009) and 2 (2009 to 2011) was used. Sex-specific multiple linear regression and logistic regressions examined the relationship of overweight and obesity (body mass index ≥ 85th percentile) with 25-hydroxyvitamin D levels and the odds of 25-hydroxyvitamin D <40 nmol/L and <50 nmol/L. RESULTS The prevalence of risk of vitamin D deficiency (25-hydroxyvitamin D < 30 nmol/L) was 6% (95% confidence interval [CI] 3.26% to 10.12%). Vitamin D inadequacy, estimated by levels <40 nmol/L, was 15% (95% CI 10.34% to 20.39%; 19% [95% CI 13.1 to 25.6] for teenagers). Seventy per cent (95% CI 63.59 to 75.17) had levels >50 nmol/L, consistent with achieving the Recommended Dietary Allowance. In adjusted analyses, overweight/obesity (1/3 of subjects) was independently associated with lower 25-hydroxyvitamin D for both sexes after adjustment for age, race, income, season, vitamin D supplementation and daily milk consumption. For 25-hydroxyvitamin D <40 nmol/L, the overweight/obese odds ratio for males was 2.63 (95% CI 1.34 to 5.18). For 25-hydroxyvitamin D <50 nmol/L, overweight/obese odds ratios were 2.19 (95% CI 1.46 to 3.28) for males and 1.39 (95% CI 1.05 to 1.84) for females. CONCLUSIONS This study confirms the inverse association between adiposity and serum concentrations of 25-hydroxyvitamin D in Canadian youth and the independent association of overweight/obesity to 25-hydroxyvitamin D level and vitamin D status after adjustment for other factors.
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Affiliation(s)
| | | | - Stephen Brooks
- Bureau of Nutritional Sciences, Health Canada, Banting Research Centre, Ottawa, Ontario
| | - Kellie Langlois
- Health Analysis Division, Statistics Canada, Ottawa, Ontario
| | - Susan J Whiting
- Collegeof Pharmacy and Nutrition, University of Saskatchewan, Saskatoon, Saskatchewan
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Cardoso S, Santos A, Guerra RS, Sousa AS, Padrão P, Moreira P, Afonso C, Amaral TF, Borges N. Association between serum 25-hidroxyvitamin D concentrations and ultraviolet index in Portuguese older adults: a cross-sectional study. BMC Geriatr 2017; 17:256. [PMID: 29089044 PMCID: PMC5664428 DOI: 10.1186/s12877-017-0644-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2017] [Accepted: 10/16/2017] [Indexed: 12/14/2022] Open
Abstract
Background The older population is a risk group for hypovitaminosis D. The Ultraviolet Index (UVI) can be an indicator of potential for cutaneous synthesis of vitamin D but physiological and other environmental factors also influence vitamin D synthesis and status. Knowledge about vitamin D status in Portuguese older adults is limited. This study aims to explore the association between Ultraviolet Index and serum 25-hidroxyvitamin D3 [25(OH)D] levels accounting for other potential influential factors. Methods A cross-sectional study was conducted between December 2015 and June 2016, in 1497 Portuguese older adults (≥ 65 years) within Nutrition UP 65 project. For each participant, serum 25(OH)D was determined and the mean UVI (mUVI) in the respective residence district was calculated for the previous 30 days. Stepwise linear regression analyses were conducted for the following periods of blood collection: between December and June, December and March and April and June. Standardized regression coefficients (Sβ) and 95% confidence intervals were calculated. Results The median 25(OH)D concentration was 35.9 nmol/L. The UVI was independently and positively associated with 25(OH)D in the models for December–June (Sβ = 0.244, 95% CI: 0.198; 0.291, P < 0.001) and April–June (Sβ = 0.295, 95% CI: 0.299; 0.362, P < 0.001) and independently and negatively associated in December–March period (Sβ = −0.149, 95% CI: -0.211; −0.087, P < 0.001). Conclusions In this sample with high vitamin D deficiency frequency, the UVI was a predictor of 25(OH)D levels but the direction of the association varied according to the blood collection period. Our results suggest that accounting for the time of year in future research regarding vitamin status and related public health recommendations may be relevant. Electronic supplementary material The online version of this article (10.1186/s12877-017-0644-8) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Sofia Cardoso
- Faculdade de Ciências da Nutrição e Alimentação da Universidade do Porto Rua Dr. Roberto Frias, 4200-465, Porto, Portugal
| | - Alejandro Santos
- Faculdade de Ciências da Nutrição e Alimentação da Universidade do Porto Rua Dr. Roberto Frias, 4200-465, Porto, Portugal.,I3S-Instituto de Investigação e Inovação em Saúde, R. Alfredo Allen, 4200-135, Porto, Portugal
| | - Rita S Guerra
- Faculdade de Ciências da Nutrição e Alimentação da Universidade do Porto Rua Dr. Roberto Frias, 4200-465, Porto, Portugal.,UISPA, LAETA-INEGI, Faculdade de Engenharia, Universidade do Porto, Porto, Portugal
| | - Ana S Sousa
- Faculdade de Ciências da Nutrição e Alimentação da Universidade do Porto Rua Dr. Roberto Frias, 4200-465, Porto, Portugal
| | - Patrícia Padrão
- Faculdade de Ciências da Nutrição e Alimentação da Universidade do Porto Rua Dr. Roberto Frias, 4200-465, Porto, Portugal.,EPIUnit, Instituto de Saúde Pública, Universidade do Porto, Rua das Taipas, n° 135, 4050-600, Porto, Portugal
| | - Pedro Moreira
- Faculdade de Ciências da Nutrição e Alimentação da Universidade do Porto Rua Dr. Roberto Frias, 4200-465, Porto, Portugal.,Centro de Investigação em Atividade Física, Saúde e Lazer, Universidade do Porto, R. Dr. Plácido da Costa 91, 4200-450, Porto, Portugal.,CINTESIS - Centre for Health Technology and Services Research, Rua Dr. Plácido da Costa, 4200-450, Porto, Portugal
| | - Cláudia Afonso
- Faculdade de Ciências da Nutrição e Alimentação da Universidade do Porto Rua Dr. Roberto Frias, 4200-465, Porto, Portugal
| | - Teresa F Amaral
- Faculdade de Ciências da Nutrição e Alimentação da Universidade do Porto Rua Dr. Roberto Frias, 4200-465, Porto, Portugal.,UISPA, LAETA-INEGI, Faculdade de Engenharia, Universidade do Porto, Porto, Portugal
| | - Nuno Borges
- Faculdade de Ciências da Nutrição e Alimentação da Universidade do Porto Rua Dr. Roberto Frias, 4200-465, Porto, Portugal. .,CINTESIS - Centre for Health Technology and Services Research, Rua Dr. Plácido da Costa, 4200-450, Porto, Portugal.
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Scragg RKR, Stewart AW, McKenzie RL, Reeder AI, Liley JB, Allen MW. Sun exposure and 25-hydroxyvitamin D 3 levels in a community sample: Quantifying the association with electronic dosimeters. JOURNAL OF EXPOSURE SCIENCE & ENVIRONMENTAL EPIDEMIOLOGY 2017; 27:471-477. [PMID: 27599885 DOI: 10.1038/jes.2016.51] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2015] [Accepted: 11/02/2015] [Indexed: 06/06/2023]
Abstract
There is uncertainty about the amount of sun exposure required to increase low blood 25-hydroxyvitamin D (25(OH)D3) levels, a possible disease risk factor. The study aimed to quantify the association between sun exposure and serum 25(OH)D3 concentrations in a multiethnic community sample (n=502) living in Auckland (37°S) and Dunedin (46°S), New Zealand, aged 18-85 years. They wore electronic ultraviolet dosimeters between March and November (autumn, winter and spring) for 8 weeks to record their sun exposure. This was converted to standard erythemal doses (SEDs), corrected for clothing to generate equivalent full-body exposures, SEDEFB. Blood samples were collected at the end of weeks 4 and 8 to measure 25(OH)D3. Median weekly SEDEFB was 0.33 during weeks 1-4 and 0.34 during weeks 5-8. Weekly exposures <0.5 SEDEFB during weeks 5-8 were associated with decreasing 25(OH)D3 concentrations at the end of week 8. There was a non-linear association between sun exposure and 25(OH)D3, with most of the increase in 25(OH)D3 being at exposures <2 SEDEFB per week. This finding suggests that vitamin D status is increased by regular small sun exposures (<2 SEDEFB per week), and that greater exposures result in only small additional increases in 25(OH)D3.
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Affiliation(s)
- Robert K R Scragg
- Section of Epidemiology and Biostatistics, School of Population Health, University of Auckland, Auckland, New Zealand
| | - Alistair W Stewart
- Section of Epidemiology and Biostatistics, School of Population Health, University of Auckland, Auckland, New Zealand
| | - Richard L McKenzie
- National Institute of Water and Atmospheric Research, Lauder, New Zealand
| | - Anthony I Reeder
- Cancer Society Social and Behavioural Research Unit, Department of Preventive and Social Medicine, University of Otago, Dunedin, New Zealand
| | - J Ben Liley
- National Institute of Water and Atmospheric Research, Lauder, New Zealand
| | - Martin W Allen
- Department of Electrical and Computer Engineering, University of Canterbury, Christchurch, New Zealand
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Impact of Orientation on the Vitamin D Weighted Exposure of a Human in an Urban Environment. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2017; 14:ijerph14080920. [PMID: 28813022 PMCID: PMC5577621 DOI: 10.3390/ijerph14080920] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Revised: 08/04/2017] [Accepted: 08/10/2017] [Indexed: 01/17/2023]
Abstract
The vitamin D3-weighted UV exposure of a human with vertical posture was calculated for urban locations to investigate the impact of orientation and obstructions on the exposure. Human exposure was calculated by using the 3D geometry of a human and integrating the radiance, i.e., the radiant energy from the direct solar beam and the diffuse sky radiation from different incident and azimuth angles. Obstructions of the sky are derived from hemispherical images, which are recorded by a digital camera with a fisheye lens. Due to the low reflectivity of most surfaces in the UV range, the radiance from obstructed sky regions was neglected. For spring equinox (21 March), the exposure of a human model with winter clothing in an environment where obstructions cover 40% of the sky varies by up to 25%, depending on the orientation of the human model to the sun. The calculation of the accumulated vitamin D3-weighted exposure of a human with winter clothing walking during lunch break shows that human exposure is reduced by the obstruction of buildings and vegetation by 40%.
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O’Brien DM, Thummel KE, Bulkow LR, Wang Z, Corbin B, Klejka J, Hopkins SE, Boyer BB, Hennessy TW, Singleton R. Declines in traditional marine food intake and vitamin D levels from the 1960s to present in young Alaska Native women. Public Health Nutr 2017; 20:1738-1745. [PMID: 27465921 PMCID: PMC5274583 DOI: 10.1017/s1368980016001853] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2015] [Revised: 05/23/2016] [Accepted: 06/15/2016] [Indexed: 01/19/2023]
Abstract
OBJECTIVE To measure the trends in traditional marine food intake and serum vitamin D levels in Alaska Native women of childbearing age (20-29 years old) from the 1960s to the present. DESIGN We measured a biomarker of traditional food intake, the δ15N value, and vitamin D level, as 25-hydroxycholecalciferol (25(OH)D3) concentration, in 100 serum samples from 20-29-year-old women archived in the Alaska Area Specimen Bank, selecting twenty-five per decade from the 1960s to the 1990s. We compared these with measurements of red-blood-cell δ15N values and serum 25(OH)D3 concentrations from 20-29-year-old women from the same region collected during the 2000s and 2010s in a Center for Alaska Native Health Research study. SETTING The Yukon Kuskokwim Delta region of south-west Alaska. SUBJECTS Alaska Native women (n 319) aged 20-29 years at the time of specimen collection. RESULTS Intake of traditional marine foods, as measured by serum δ15N values, decreased significantly each decade from the 1960s through the 1990s, then remained constant from the 1990s through the present (F 5,306=77·4, P<0·0001). Serum vitamin D concentrations also decreased from the 1960s to the present (F 4,162=26·1, P<0·0001). CONCLUSIONS Consumption of traditional marine foods by young Alaska Native women dropped significantly between the 1960s and the 1990s and was associated with a significant decline in serum vitamin D concentrations. Studies are needed to evaluate the promotion of traditional marine foods and routine vitamin D supplementation during pregnancy for this population.
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Affiliation(s)
- Diane M O’Brien
- Center for Alaska Native Health Research, Institute of Arctic Biology, University of Alaska, PO Box 757000, Fairbanks, AK 99775–7000, USA
- Department of Biology and Wildlife, University of Alaska, Fairbanks, AK, USA
| | | | - Lisa R Bulkow
- Arctic Investigations Program, Division of Preparedness and Emerging Infections, National Center for Emerging and Zoonotic Infectious Diseases, Centers for Disease Control and Prevention, Anchorage, AK, USA
| | - Zhican Wang
- School of Pharmacy, University of Washington, Seattle, WA, USA
| | - Brittany Corbin
- Department of Biology and Wildlife, University of Alaska, Fairbanks, AK, USA
| | | | - Scarlett E Hopkins
- Center for Alaska Native Health Research, Institute of Arctic Biology, University of Alaska, PO Box 757000, Fairbanks, AK 99775–7000, USA
| | - Bert B Boyer
- Center for Alaska Native Health Research, Institute of Arctic Biology, University of Alaska, PO Box 757000, Fairbanks, AK 99775–7000, USA
| | - Thomas W Hennessy
- Arctic Investigations Program, Division of Preparedness and Emerging Infections, National Center for Emerging and Zoonotic Infectious Diseases, Centers for Disease Control and Prevention, Anchorage, AK, USA
| | - Rosalyn Singleton
- Arctic Investigations Program, Division of Preparedness and Emerging Infections, National Center for Emerging and Zoonotic Infectious Diseases, Centers for Disease Control and Prevention, Anchorage, AK, USA
- Alaska Native Tribal Health Consortium, Division of Community Health Services, Anchorage, AK, USA
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Santos A, Amaral TF, Guerra RS, Sousa AS, Álvares L, Moreira P, Padrão P, Afonso C, Borges N. Vitamin D status and associated factors among Portuguese older adults: results from the Nutrition UP 65 cross-sectional study. BMJ Open 2017; 7:e016123. [PMID: 28645977 PMCID: PMC5724139 DOI: 10.1136/bmjopen-2017-016123] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Revised: 04/06/2017] [Accepted: 04/26/2017] [Indexed: 12/16/2022] Open
Abstract
OBJECTIVES To evaluate vitamin D status and its associated factors in Portuguese older adults from the Nutrition UP 65 study. DESIGN Cross-sectional observational study. PARTICIPANTS AND METHODS Nationwide cluster sample of 1500 Portuguese subjects ≥65 years old. Participants were classified, according to US Institute of Medicine cut-offs, as presenting normal 25-hydroxyvitamin D (25(OH)D) levels (≥50.0 nmol/L), at risk of inadequacy (30.0-49.9 nmol/L) or at risk of deficiency (<30 nmol/L). The association between individuals' characteristics and 25(OH)D levels was analysed through multinomial logistic regression analysis. RESULTS Median 25(OH)D serum value was 36.1 (interquartile range (IQR): 35.5) nmol/L. According to the used cut-offs, 39.6% of participants were at risk of 25(OH)D deficiency and 29.4% were at risk of 25(OH)D inadequacy. In the adjusted model, having higher skin pigmentation and waist circumference >88 cm for women and >102 cm for men were associated with higher odds of 25(OH)D deficiency. Otherwise, living in Lisbon Metropolitan Area and in Madeira, 1-12 years of schooling, being married or in a common-law marriage, monthly income ≥€1000, alcohol consumption, medication or supplements with vitamin D supplement use, and blood samples collected in spring or summer were associated with lower odds of being at risk of 25(OH)D deficiency. In this model, season of blood sample collection, medication or supplements use, and waist circumference were the factors more strongly associated with 25(OH)D levels. CONCLUSIONS Despite using the conservative Institute of Medicine cut-offs, over two-thirds of these study participants presented inadequate 25(OH)D levels, warranting the implementation of corrective measures. Potentially modifiable factors were strongly associated with 25(OH)D levels in this study. These findings may be particularly relevant to the development of public health policies in southern European countries.
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Affiliation(s)
- Alejandro Santos
- Faculdade de Ciências da Nutrição e Alimentação, Universidade do Porto, Porto, Portugal
- i3S-Instituto de Investigação e Inovação em Saúde, Porto, Portugal
| | - Teresa F Amaral
- Faculdade de Ciências da Nutrição e Alimentação, Universidade do Porto, Porto, Portugal
- UISPA, LAETA-INEGI, Faculdade de Engenharia, Universidade do Porto, Porto, Portugal
| | - Rita S Guerra
- Faculdade de Ciências da Nutrição e Alimentação, Universidade do Porto, Porto, Portugal
- UISPA, LAETA-INEGI, Faculdade de Engenharia, Universidade do Porto, Porto, Portugal
| | - Ana S Sousa
- Faculdade de Ciências da Nutrição e Alimentação, Universidade do Porto, Porto, Portugal
| | - Luisa Álvares
- Faculdade de Ciências da Nutrição e Alimentação, Universidade do Porto, Porto, Portugal
| | - Pedro Moreira
- Faculdade de Ciências da Nutrição e Alimentação, Universidade do Porto, Porto, Portugal
- EPIUnit – Instituto de Saúde Pública, Universidade do Porto, Porto, Portugal
- Centro de Atividade Física, Saúde e Lazer, Universidade do Porto, Porto, Portugal
| | - Patrícia Padrão
- Faculdade de Ciências da Nutrição e Alimentação, Universidade do Porto, Porto, Portugal
- EPIUnit – Instituto de Saúde Pública, Universidade do Porto, Porto, Portugal
| | - Cláudia Afonso
- Faculdade de Ciências da Nutrição e Alimentação, Universidade do Porto, Porto, Portugal
| | - Nuno Borges
- Faculdade de Ciências da Nutrição e Alimentação, Universidade do Porto, Porto, Portugal
- CINTESIS - Center for Health Technology and Services Research, Porto, Portugal
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Gellert S, Ströhle A, Hahn A. Breastfeeding woman are at higher risk of vitamin D deficiency than non-breastfeeding women - insights from the German VitaMinFemin study. Int Breastfeed J 2017; 12:19. [PMID: 28435438 PMCID: PMC5397784 DOI: 10.1186/s13006-017-0105-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Accepted: 03/13/2017] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND Despite increased awareness of the adverse health effects of vitamin D deficiency, only a few studies have evaluated the vitamin D status (25-hydroxyvitamin D [25(OHD)]) of breastfeeding women and up to now, no information exits for German breastfeeding women. Therefore, the aim of study was to determine the vitamin D status of breastfeeding women compared to non-pregnant and non-breastfeeding (NPNB) women. METHODS This cross-sectional study investigated 124 breastfeeding women and 124 age and season matched NPNB women from the German "Vitamin and mineral status among German women" study. The study participants were recruited from April 2013 to March 2015 and did not take vitamin D supplements. Serum 25(OH)D was analyzed by chemiluminescent immunoassay. RESULTS Vitamin D deficiency (<25.0 nmol/L) was prevalent in 26.6% of the breastfeeding women. The majority of women (49.2%) showed 25(OH)D concentration between 25.0 and 49.9 nmol/L. In multiple binary logistic regression analysis, breastfeeding women had a 4.0-fold higher odds ratio (OR) (95% confidence interval [CI] 1.8, 8.7) for vitamin D deficiency than NPNB women. For breastfeeding women, the risk of vitamin D deficiency was higher in the winter and spring months (OR: 2.6, 95% CI 1.1, 6.3) and increased with lower longitude per one unit (OR 0.7, 95% CI 0.6, 0.9). CONCLUSION Breastfeeding women in Germany had a higher risk of deficient vitamin D levels than NPNB women. In further studies, the optimal vitamin D status for breastfeeding women should be investigated and also the required vitamin D doses to ensure this vitamin D status. TRIAL REGISTRATION German Clinical Trial Register (identification number: DRKS00004789).
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Affiliation(s)
- Sandra Gellert
- Leibniz University Hannover, Am Kleinen Felde 30, 30167 Hannover, Germany
| | - Alexander Ströhle
- Leibniz University Hannover, Am Kleinen Felde 30, 30167 Hannover, Germany
| | - Andreas Hahn
- Leibniz University Hannover, Am Kleinen Felde 30, 30167 Hannover, Germany
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Rivas M, Rojas E, Calaf GM, Barberán M, Liberman C, De Paula Correa M. Association between non-melanoma and melanoma skin cancer rates, vitamin D and latitude. Oncol Lett 2017; 13:3787-3792. [PMID: 28521479 DOI: 10.3892/ol.2017.5898] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2016] [Accepted: 11/17/2016] [Indexed: 01/01/2023] Open
Abstract
Vitamin D synthesis takes place in the skin due to solar ultraviolet-B (UVB) radiation. Several studies have shown the association between low sun exposure, non-melanoma skin cancer (NMSC) and a lack of vitamin D synthesis. Since such synthesis in the body depends on the exposure of the skin to solar UVB radiation (290-320 nm), experimental measurements of this type of solar radiation are important. Tarapaca University in Arica, Chile, established a solar UV radiation laboratory in 2006 and since then this laboratory has performed systematic experimental solar UVB measurements using a calibrated biometer instrument. The results, which are presented in the current study, showed the association between NMSC and MSC rates, and the time required to produce 1,000 IU vitamin D with latitudinal variation. Solar UV index (UVI) levels reported in 6 cities from the north to the south of Chile indicated that the UVI ratio of monthly mean values was 1.8 times higher in Arica than in Punta Arenas in January (summer in Chile), whereas it was 14 times higher in June (winter). This factor is an important consideration, since vitamin D synthesis is directly associated with the exposure of individuals to solar UVB radiation. A similar trend was observed in Antofagasta, Santiago, Concepcion, Valdivia and Punta Arenas. It can be concluded from these data that there is a direct association between NMSC rates and mortality, and UVB radiation, meaning that this type of cancer would not depend on vitamin D synthesis and therefore on calcium uptake. By contrast, MSC rates increased with decreased levels of vitamin D, and thus calcium uptake, in all cities, with the only exception being Punta Arenas.
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Affiliation(s)
- Miguel Rivas
- Department of Physics, Faculty of Science, Tarapaca University, Arica 8097877, Chile
| | - Elisa Rojas
- Department of Physics, Faculty of Science, Tarapaca University, Arica 8097877, Chile
| | - Gloria M Calaf
- Institute for Advanced Research, Tarapaca University, Arica 8097877, Chile.,Center for Radiological Research, Columbia University Medical Center, New York, NY 10032, USA
| | - Marcela Barberán
- Endocrinology and Diabetes Section, Clinical Hospital of University of Chile, Santiago 8320000, Chile
| | - Claudio Liberman
- Endocrinology and Diabetes Section, Clinical Hospital of University of Chile, Santiago 8320000, Chile
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Michaëlsson K, Wolk A, Byberg L, Mitchell A, Mallmin H, Melhus H. The seasonal importance of serum 25-hydroxyvitamin D for bone mineral density in older women. J Intern Med 2017; 281:167-178. [PMID: 27665750 DOI: 10.1111/joim.12563] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND The impact of season when determining a serum 25-hydroxyvitamin D (S-25OHD) cut-off level for optimal bone health is unknown. OBJECTIVE To investigate the relative importance of S-25OHD for bone mineral density (BMD) by season. METHODS A subcohort of 5002 Swedish women (mean age 68 years), randomly selected from a large population-based longitudinal cohort study with repeat dietary and lifestyle information, was enrolled during 2003-2009 for a clinical examination, which included dual-energy X-ray absorptiometry and collection of fasting blood samples. Categories of vitamin D status were determined by S-25OHD (measured by HPLC-MS/MS). RESULTS In samples collected during summer, we found a gradual increase in BMD of the total hip up to a S-25OHD level of 40 nmol L-1 (6% of the cohort). In women with S-25OHD concentrations below 30 nmol L-1 during summer, adjusted BMD was 11% lower [95% confidence interval (CI) 3-19] and in those with S-25OHD levels of 30-40 nmol L-1 BMD was 6% lower (95% CI 1-11), compared with women with S-25OHD levels above 80 nmol L-1 . Low S-25OHD concentrations during summer (<30 nmol L-1 ) were also associated with higher adjusted relative risk of osteoporosis (4.9; 95% CI 2.9-8.4) compared with concentrations above 80 nmol L-1 . By contrast, no differences in mean BMD values between categories of S-25OHD were found during winter. CONCLUSIONS Summer concentrations of S-25OHD appear to be the most useful to predict BMD, whereas winter levels have limited value. To determine a S-25OHD cut-off level for vitamin D deficiency, it may be necessary to take into account the season of blood collection.
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Affiliation(s)
- K Michaëlsson
- Department of Surgical Sciences, Uppsala University, Uppsala, Sweden
| | - A Wolk
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - L Byberg
- Department of Surgical Sciences, Uppsala University, Uppsala, Sweden
| | - A Mitchell
- Department of Surgical Sciences, Uppsala University, Uppsala, Sweden
| | - H Mallmin
- Department of Surgical Sciences, Uppsala University, Uppsala, Sweden
| | - H Melhus
- Department of Medical Sciences, Uppsala University, Uppsala, Sweden
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Andersson Å, Björk A, Kristiansson P, Johansson G. Vitamin D intake and status in immigrant and native Swedish women: a study at a primary health care centre located at 60°N in Sweden. Food Nutr Res 2017. [PMCID: PMC4650971 DOI: 10.3402/fnr.v57i0.20089] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Background Objectives Design Results Conclusion
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Affiliation(s)
- Åsa Andersson
- Gottsunda Primary Health Care Centre, Uppsala, Sweden
- Åsa Andersson, Gottsunda Primary Health Care Centre, Box 25024, SE-750 25 Uppsala, Sweden. Tel: +46 18 6118640.
| | - Anne Björk
- Department of Public Health and Caring Sciences, Family Medicine and Preventive Medicine, Uppsala University, Uppsala, Sweden
| | - Per Kristiansson
- Department of Public Health and Caring Sciences, Family Medicine and Preventive Medicine, Uppsala University, Uppsala, Sweden
| | - Gunnar Johansson
- Department of Public Health and Caring Sciences, Family Medicine and Preventive Medicine, Uppsala University, Uppsala, Sweden
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Chen J, Yun C, He Y, Piao J, Yang L, Yang X. Vitamin D status among the elderly Chinese population: a cross-sectional analysis of the 2010-2013 China national nutrition and health survey (CNNHS). Nutr J 2017; 16:3. [PMID: 28088200 PMCID: PMC5237548 DOI: 10.1186/s12937-016-0224-3] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2016] [Accepted: 12/21/2016] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Vitamin D inadequacy is common among the elderly, especially within the Asian population. The vitamin D status among healthy adults in the elderly Chinese population was evaluated. METHODS A total of 6014 healthy adults aged 60 years or older (2948 men, 3066 women) participated in this descriptive cross-sectional analysis. Possible predictors of vitamin D inadequacy were evaluated via multiple logistic regression analyses. RESULTS The median serum 25-hydroxyvitamin D (25(OH)D) levels were 61.0 nmol/l (interquartile range (IQR) 44.3-80.6, range 5.1-154.5) for men and 53.7 nmol/l (IQR 38.8-71.0, range 6.0-190.0) for women, with 34.1% (95% confidence interval (CI) 32.4-35.8) of men and 44.0% (95% CI 42.2-45.8) of women presenting vitamin D inadequacy (25(OH)D <50 nmol/l). According to the multivariate logistic regression analyses, vitamin D inadequacy was positively correlated with female gender (P <0.0001), underweight (P = 0.0259), the spring season (P <0.0001), low ambient UVB levels (P <0.0001) and living in large cities (P = 0.0026). For men, vitamin D inadequacy was positively correlated with the spring season (P = 0.0015), low ambient UVB levels (P <0.0001) and living in large cities (P = 0.0022); for women, vitamin D inadequacy was positively correlated with the spring season (P = 0.0005) and low ambient UVB levels (P <.0001). CONCLUSIONS Vitamin D inadequacy is prevalent among the elderly population in China. Because residing in regions with low ambient UVB levels increases the risk of vitamin D inadequacy both for men and women, vitamin D supplementation and sensible sun exposure should be encouraged, especially during the cooler seasons. Further studies are required to determine the optimal vitamin D intake and sun exposure levels to maintain sufficient vitamin D levels in the elderly Chinese population.
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Affiliation(s)
- Jing Chen
- Department of Trace Element Nutrition, National Institute of Nutrition and Health, Chinese Center for Disease Control and Prevention, Room 103, Nanwei Road No. 29, Xicheng District, Beijing, 100050, People's Republic of China
| | - Chunfeng Yun
- Institute of Population Research, Peking University, Beijing, 100871, People's Republic of China
| | - Yuna He
- Department of Nutrition Surveillance, National Institute of Nutrition and Health, Chinese Center for Disease Control and Prevention, Beijing, 100050, People's Republic of China
| | - Jianhua Piao
- Department of Trace Element Nutrition, National Institute of Nutrition and Health, Chinese Center for Disease Control and Prevention, Room 103, Nanwei Road No. 29, Xicheng District, Beijing, 100050, People's Republic of China
| | - Lichen Yang
- Department of Trace Element Nutrition, National Institute of Nutrition and Health, Chinese Center for Disease Control and Prevention, Room 103, Nanwei Road No. 29, Xicheng District, Beijing, 100050, People's Republic of China
| | - Xiaoguang Yang
- Department of Trace Element Nutrition, National Institute of Nutrition and Health, Chinese Center for Disease Control and Prevention, Room 103, Nanwei Road No. 29, Xicheng District, Beijing, 100050, People's Republic of China.
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Szabó B, Tabák ÁG, Toldy E, Szekeres L, Szili B, Bakos B, Balla B, Kósa JP, Lakatos P, Takács I. The role of serum total and free 25-hydroxyvitamin D and PTH values in defining vitamin D status at the end of winter: a representative survey. J Bone Miner Metab 2017; 35:83-90. [PMID: 26661476 DOI: 10.1007/s00774-015-0729-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/06/2015] [Accepted: 11/18/2015] [Indexed: 12/12/2022]
Abstract
We sought the lowest serum total 25-hydroxyvitamin D (t-25OHD) values in geographic areas with four seasons and investigated whether the calculation of serum free 25-hydroxyvitamin D (f-25OHD) could provide additional information on vitamin D status. This is a representative, cross-sectional study restricted to a sampling period at the end of winter, using a non-probability, stratified sample of the adult community-dwelling Hungarian population (n = 882). We measured t-25OHD, vitamin D binding protein (DBP), parathyroid hormone (PTH), and albumin levels. f-25OHD concentrations were calculated. We assessed environmental factors that could affect vitamin D levels and diseases possibly related to vitamin D deficiency. Mean t-25OHD values of the total population were 41.3 ± 20.6 nmol/L. t-25OHD levels were below 75, 50, and 30 nmol/L in 97, 77, and 34 % of participants not receiving vitamin D supplementation, respectively. t-25OHD values weakly positively correlated with DBP (r = 0.174; p = 0.000), strongly with f-25OHD (r = 0.70; p = 0.000). The association between t-25OHD and f-25OHD and between t-25OHD and PTH were non-linear (p squared term = 0.0004 and 0.004, respectively). t-25OHD levels were not affected by gender, age, place of residence; however, they were related to body mass index, sunbed sessions, and tropical travel. In contrast, f-25OHD levels were different in males and females but were not related to obesity. t- and f-25OHD were lower among people with cardiovascular diseases (p = 0.012). Nearly the entire Hungarian population is vitamin D insufficient at the end of winter. The use of t-25OHD could show a spurious association with obesity; however, it does not reflect the obvious sex difference.
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Affiliation(s)
- Boglárka Szabó
- 1st Department of Medicine, Semmelweis University Faculty of Medicine, Budapest, Korányi Sándor u. 2/a, Budapest, 1083, Hungary
| | - Ádám G Tabák
- Department of Epidemiology and Public Health, University College London, London, UK
| | - Erzsébet Toldy
- Faculty of Health Science, Institute of Diagnostics, University of Pécs, Pécs, Hungary
- Central Laboratory, Markusovszky Teaching Hospital, Szombathely, Hungary
| | - László Szekeres
- National Institute of Rheumatology and Physiotherapy, Budapest, Hungary
| | - Balázs Szili
- 1st Department of Medicine, Semmelweis University Faculty of Medicine, Budapest, Korányi Sándor u. 2/a, Budapest, 1083, Hungary
| | - Bence Bakos
- 1st Department of Medicine, Semmelweis University Faculty of Medicine, Budapest, Korányi Sándor u. 2/a, Budapest, 1083, Hungary
| | - Bernadett Balla
- 1st Department of Medicine, Semmelweis University Faculty of Medicine, Budapest, Korányi Sándor u. 2/a, Budapest, 1083, Hungary
| | - János Pál Kósa
- 1st Department of Medicine, Semmelweis University Faculty of Medicine, Budapest, Korányi Sándor u. 2/a, Budapest, 1083, Hungary
| | - Péter Lakatos
- 1st Department of Medicine, Semmelweis University Faculty of Medicine, Budapest, Korányi Sándor u. 2/a, Budapest, 1083, Hungary
| | - István Takács
- 1st Department of Medicine, Semmelweis University Faculty of Medicine, Budapest, Korányi Sándor u. 2/a, Budapest, 1083, Hungary.
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Sun exposure, UV irradiance and serum 25-hydroxycholecalciferol in pregnant women in rural north India. Public Health Nutr 2016; 20:1755-1759. [PMID: 27989262 DOI: 10.1017/s136898001600313x] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
OBJECTIVE To document the effect of season and environmental pollution on UVB irradiance; and to estimate cutaneous vitamin D synthesis in village women in different seasons. DESIGN Radiant UVB energy was measured by a spectroradiometer in different seasons and, in April and May, on successive days in open areas at the city outskirts, at a crowded inner-city area and the villages of our participants. Clothing, outdoor activity pattern and serum 25-hydroxycholecalciferol (25(OH)D) levels were documented. SETTING Rural north India, latitude 26·8°N. SUBJECTS Pregnant women (n 139, aged 20-40 years). RESULTS UVB irradiance ranged from 56 µW/cm2 in January to 470 µW/cm2 in June. Proportion of skin exposed was 18·5 % in summer and 9·5 % in winter. Mean (sd) daily duration of sun exposure was 3·2 (0·2) h during winter and 2·1 (0·4) h during summer. Cutaneous vitamin D synthesis was estimated to be 19·25 µg (770 IU) during winter and 37·25 µg (1490 IU) during summer. Mean (sd) serum 25(OH)D was 28 (15) nmol/l during winter (92 % of participants with 50 nmol/l). Mean (sd) UVB irradiance at peak summer was significantly higher at the open areas and in the villages than at the inner-city location (340 (45) and 310 (60) v. 250 (50) µW/cm2, P=0·03). CONCLUSIONS In our population, at latitude 26·8°N, poor skin exposure is a limiting factor in all seasons. During winter, low UVB radiation energy also contributes. Particulate pollution limits UVB irradiance. Vitamin D supplementation during winter may be necessary.
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Miyauchi M, Nakajima H. Determining an Effective UV Radiation Exposure Time for Vitamin D Synthesis in the Skin Without Risk to Health: Simplified Estimations from UV Observations. Photochem Photobiol 2016; 92:863-869. [DOI: 10.1111/php.12651] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Accepted: 09/14/2016] [Indexed: 11/30/2022]
Affiliation(s)
- Masaatsu Miyauchi
- Center for Global Environmental Research National Institute for Environmental Studies Tsukuba Ibaraki 305‐8506 Japan
| | - Hideaki Nakajima
- Center for Global Environmental Research National Institute for Environmental Studies Tsukuba Ibaraki 305‐8506 Japan
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Goodman S, Morrongiello B, Meckling K. A randomized, controlled trial evaluating the efficacy of an online intervention targeting vitamin D intake, knowledge and status among young adults. Int J Behav Nutr Phys Act 2016; 13:116. [PMID: 27836017 PMCID: PMC5106840 DOI: 10.1186/s12966-016-0443-1] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2016] [Accepted: 11/02/2016] [Indexed: 12/23/2022] Open
Abstract
Background Vitamin D plays a key role in bone health. Consuming adequate vitamin D during young adulthood is important due to the development of peak bone mass; however, many Canadian young adults do not meet vitamin D recommendations. This study aimed to improve knowledge, perceptions, dietary intake and blood concentrations of vitamin D among a sample of young adults. Methods Using a pre-post design, 90 Ontario adults (38 men, 52 women; 18–25 years), were randomly assigned to intervention or control groups. Participants completed a socio-demographic survey, pre-post food frequency questionnaire, and a vitamin D knowledge questionnaire (3 time-points). The intervention group watched a video, received online information and tracked intake of vitamin D using a mobile application for 12 weeks. A sub-sample of participants completed pre-post blood 25(OH)D3 tests. Univariate ANOVA tested pre-post between-group differences in vitamin D intake and status. Repeated-measures ANOVA tested between-group differences in vitamin D knowledge and perceptions across 3 time-points. Results Mean vitamin D intake in the sample increased significantly from pre-test (M = 407, SD = 460 IU) to post-test (M = 619, SD = 655 IU), t(88) = 5.37, p < 0.001. Mean intake increased significantly more in the intervention than control group after controlling for gender and education, F(1, 85) = 4.09, p = 0.046. Mean blood vitamin D3 was significantly higher among non-Caucasian than Caucasian participants at baseline, t(56.7) = 3.49, p = 0.001. Mean blood vitamin D3 increased significantly from pre-test (M = 28, SD = 16 nmol/L) to post-test (M = 43, SD = 29 nmol/L), t(53) = 11.36, p < 0.001, but did not differ significantly between groups. The increase in vitamin D knowledge from time 1–3 was significantly higher in the intervention than control group (t(88) = 2.26, p = 0.03). The intervention group (M = 3.52, SE = 0.13) had higher overall perceived importance of vitamin D supplementation than the control (M = 3.16, SE = 0.12), F(1, 88) = 4.38, p = 0.04, ηp2 = 0.05. Conclusions Although recommendations suggest blood 25(OH)D3 concentrations of ≥50-75 nmol/L, vitamin D status was below national recommendations. While participating in an intervention did not improve vitamin D status, it led to increased vitamin D intake, knowledge and perceived importance of supplementation. Trial registration ClinicalTrails.gov registration #: NCT02118129. Electronic supplementary material The online version of this article (doi:10.1186/s12966-016-0443-1) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Samantha Goodman
- Department of Human Health and Nutritional Sciences, University of Guelph, 50 Stone Road East, Guelph, N1G2W1, ON, Canada.
| | - Barbara Morrongiello
- Department of Psychology, University of Guelph, 50 Stone Road East, Guelph, N1G 2 W1, ON, Canada
| | - Kelly Meckling
- Department of Human Health and Nutritional Sciences, University of Guelph, 50 Stone Road East, Guelph, N1G2W1, ON, Canada
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Lategan R, Van den Berg VL, Ilich JZ, Walsh CM. Vitamin D status, hypertension and body mass index in an urban black community in Mangaung, South Africa. Afr J Prim Health Care Fam Med 2016; 8:e1-e5. [PMID: 28155313 PMCID: PMC5105600 DOI: 10.4102/phcfm.v8i1.1210] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Revised: 08/31/2016] [Accepted: 08/06/2016] [Indexed: 11/23/2022] Open
Abstract
Background A strong relationship exists between hypertension and body weight. Research has linked both higher blood pressure and body weight with lower vitamin D status. Objective This study assessed the vitamin D status of a low-income, urban, black community in South Africa, to examine whether serum levels of 25-hydroxy vitamin D [25(OH)D] are associated with hypertension and body mass index (BMI). Methods Data collected from 339 adults (25–64 years) from the Assuring Health for All in the Free State (AHA-FS) study were analysed. Variables measured include serum 25(OH)D, blood pressure, weight and height to determine BMI, and HIV status. Results Mean 25(OH)D level was 38.4 ± 11.2 ng/mL for the group; 43.5 ± 11.8 ng/mL and 37.0 ± 10.6 ng/mL for males and females, respectively. Approximately 40% of the participants were HIV-positive and 63.4% hypertensive. Based on BMI, 11.8% were underweight, 33.0% normal weight, 23.0% overweight and 32.1% obese. HIV status showed no correlation with 25(OH)D levels when controlling for BMI. Poor inverse relationships were found between BMI and 25(OH)D (p = 0.01), and between mean arterial blood pressure and 25(OH)D (p = 0.05). When controlling for BMI, no correlation was found between 25(OH)D and the prevalence of hypertension or mean arterial blood pressure. Conclusion Approximately 96% of participants had an adequate vitamin D status, which could be attributed to latitude, sunny conditions and expected high levels of sun exposure because of living conditions. Results confirmed a poor inverse relationship between vitamin D status and hypertension, which seems to be dependent on BMI.
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Affiliation(s)
- Ronette Lategan
- Department of Nutrition and Dietetics, University of the Free State.
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